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1. j 0 0 O A A ON LAHA OI A igl TOi Viigit N Vo 0 Acquisitions 0 Acquisitions Old Data Start lt Old Data Continues Continue C C ES pi gt C gt gt C C Gy gt C 2 Untriggered Roll With Single Sequence New Data Points Complete Waveform Record aN 1 N 0 0 0 A 0 Acquisitions Uo O Stop CHO N 0 Q Acquisitions 0 4 Old Data Start C C Cate DIC 2 DIC C D C D Triggered Roll New Data Points Start at Trigger Point Complete Waveform Record a gt a se gt 4 N 0 0 0 0 0 0 0 0 0 New Data 0 lt Old Data L After Trigger C C Oo gt C gt Trigger Point gt Cc i gt C gt Acquisition Sequence Restarts Triggered Roll With Single Sequence New Data Points Start at Trigger P oint Complete Waveform Record DN a D 0 0 0 g Acquisitions 0 0 Stop 0 0 0 New Data 0 lt Old Data L After Trigger I ololololo l gt Trigger Point lc gt gt gt Figure 3 53 Roll Mode 500 Point Record Length 3 100 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Roll Mode 2 Set the Horizontal SCALE to 50 ms per division or slower NOTE Envelope Average acquisition modes or any of the persistence modes display modes inhibit roll mode You also inhibit roll mode i
2. w Your Tektronix digitizing oscilloscope is a superb tool for acquiring displaying and measuring waveforms Its performance addresses the needs of both lab and portable applications with the following features 200 MHz maximum analog bandwidth on the TDS 420A 400 MHz maximum analog bandwidth on the TDS 430A TDS 460A 500 MHz maximum analog bandwidth on the TDS 510A 500 Megasamples second maximum digitizing rate on the TDS 510A 100 Megasamples second maximum digitizing rate on the TDS 420A TDS 430A and TDS 460A Roll mode and triggered roll mode for display of slower waveforms on the TDS 420A TDS 430A and TDS 460A Waveform Math Invert a single waveform and add subtract and multiply two waveforms On instruments equipped with option 2F integrate or differentiate a single waveform or perform an FFT fast fourier transform on a waveform to display its magnitude or phase versus its frequency Up to 30 000 point record length per channel 120 000 point optional on the TDS 420A TDS 430A and TDS 460A Up to 50 000 point record length per channel on the TDS 510A Full GPIB software programmability GPIB hardcopy output On instru ments equipped with option 13 hardcopy output using the RS 232 or Centronics ports Complete measurement and documentation ability Intuitive graphical icon operation blended with the familiarit
3. Figure 3 51 Connecting the Digitizing Oscilloscope to a Controller Select the GPIB Port To select the GPIB port press SHIFT gt UTILITY gt System main gt I O pop up gt Port main gt GPIB pop up Configure the GPIB Port To set the GPIB mode and address do the following Press SHIFT UTILITY System main gt I O pop up gt Port main gt GPIB pop up gt Configure main gt Talk Listen Address Hardcopy Talk Only or Off Bus side See Figure 3 52 Talk Listen Address configures the port for normal controller based system operation Use the general purpose knob to define the address TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 97 Remote Communication Hardcopy Talk Only configures the port for hardcopy output without controller supervision Once the port is configured this way the oscilloscope will send the hardcopy data to any listeners on the bus when the HARDCOPY button is pressed If the port is configured any other way when the HARDCOPY button is pressed the digitizing oscilloscope displays a message saying the selected hardcopy port is unavailable Off Bus disconnects the digitizing oscilloscope from the bus 7 Tek Run 100kKS 5 Sample GPIB Address 1 GPIB Configuration E Talk Listen Address Pe GPIB Configuration Menu mi Hardcopy Talk Only 4 Off Bus
4. DMIDIDGD DIca Figure 2 17 Snapshot of Channel 1 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 2 25 Tutorial Example 4 Saving Setups The digitizing oscilloscope can save its control settings and recall them later to quickly re establish the previously saved state Do the following tasks to learn how to save and then recall a setup Save a Setup First you need to create an instrument setup you want to save Perform the following steps to create and save a setup that is complex enough that you might prefer not to go through all these steps each time you want that display 1 If you are not continuing from the previous example follow the instructions on page 2 11 under the heading Setting Up for the Examples 2 Press SETUP gt Recall Factory Setup main gt OK Confirm Factory Init side 3 Press gt AUTOSET 4 Press MEASURE gt Select Measrmnt main gt Frequency side Press the more side menu item if the Frequency selection does not appear in the side menu 5 Press CH 2 gt CLEAR MENU To save the setup do the following steps 6 Press SETUP Save Current Setup main to display the Setup main menu see Figure 2 18 2 26 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Tutorial Tek Run 100kKS 5 Sample Save Current Setup To File To Setup factory
5. Non selectedC ursor DashedLine ai 100mv y M 500s Chis 300mv Oloo oj Function Ololololololo Figure 3 64 H Bars Cursor Menu and Readouts 424mv Position of Vertical Bar Cursors Useful N for Locating Cursors A Tek un 250S 3 Se a A P Cursor Readout Paired Ai emv Function Selected Cursor Solid Vertical Bar Non selected Cursor Dashed Vertical Bar M 200s Chi 110mv DIC O O O Figure 3 65 Paired Cursor Menu and Readouts TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 119 Taking Cursor Measurements Set Mode and Adjust the To select the cursor mode and adjust the cursors in either mode do the Cursors following steps 1 Press CURSOR Mode main gt Independent or Tracking side Independent makes each cursor positionable without regard to the position of the other cursor Tracking makes both cursors positionable in tandem that is both cursors move in unison and maintain a fixed horizontal or vertical distance between each other 2 Adjust the cursors according to the mode you have selected To adjust either cursor in independent mode use the general purpose knob to move the selected active cursor A s
6. Lmlolo alo Figure 3 16 Define FFT Waveform Menu 6 Press Set FFT Source to side repeatedly until the channel source selected in step 1 appears in the menu label 7 Press Set FFT Vert Scale to side repeatedly to choose from the following vertical scale types m dBV RMS Magnitude is displayed using log scale expressed in dB relative to 1 Vrms where 0 dB 1 Vrms Linear RMS Magnitude is displayed using voltage as the scale m Phase deg Phase is displayed using degrees as the scale where degrees wrap from 180 to 180 m Phase rad Phase is displayed using radians as the scale where radians wrap from TM to M The topic Considerations for Phase Displays on page 3 37 provides in depth information on setup for phase displays 8 Press Set FFT Window to side repeatedly to choose from the following window types m Rectangular Best type for resolving frequencies that are very close to the same value but worst for accurately measuring the amplitude of those TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 29 Fast Fourier Transforms 3 30 10 11 12 frequencies Best type for measuring the frequency spectrum of non repetitive signals and measuring frequency components near DC Hamming Very good for resolving frequencies that are very close to the same value with somewhat improved amplitude accuracy
7. PC Compatible with Microsoft Windows TDS Family Programmer Figure D 1 Equipment Needed to Run the Example Programs Loading the Programs For instructions on installing the programmer manual and the other software on the TDS Family Programmer Manual disk read the readme file on the disk Running the Help Program To run the programmer manual help file using Windows 3 1 perform the following 1 Double click on the TDS Family Programmer program group 2 Double click on the TDS Family Programmer icon If you have not created a program group or a Windows 95 shortcut use the File Manager Windows 3 1 or Explorer Windows 95 to select and run the tds pgm hlp program TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual D 1 Appendix D Programmer Disk D 2 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual SS a Glossary Accuracy The closeness of the indicated value to the true value Acquisition The process of sampling signals from input channels digitizing the samples into data points and assembling the data points into a waveform record The waveform record is stored in memory The trigger marks time zero in that process Acquisition interval The time duration of the waveform record divided by the record length The digitizing oscilloscope displays one data point for every acquisition interval Active cursor The cursor that moves when you turn the general purp
8. To Setup 2 factory To Setup3 factory 1of3 Oloo 200mv q M 500s Chis 280mv more Save keca File alicia Factory File Setu Setup utilities Ololololololo Figure 2 18 Save Recall Setup Menu 7 Press one of the To Setup side menu buttons to store the current instrument settings into that setup location Remember which setup location you selected for use later Once you have saved a particular setup you can change the settings as you wish knowing that you can come back to that setup at any time 8 Press MEASURE gt Positive Width side to add that measurement to the display Recall a Setup To recall the setup press SETUP gt Recall Saved Setup main gt Recall Setup side for the setup location you used in the last exercise TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 2 27 Tutorial 2 28 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Overview This chapter describes the details of operating the digitizing oscilloscope It contains an alphabetical list of tasks you can perform with the digitizing oscilloscope Use this chapter to answer specific questions about instrument operation The following tasks are included Accessing Help Acquisition Modes Delayed Triggering Determining Status Display Modes Edge Triggering Fast Fourier Transforms File System Hardcopy Horizo
9. 2oomv TO M 500s Chit 20mv DOll Configure System Port oiy lt O gt lt cpie gt Meee Ololololololo Figure 3 52 Utility Menu 3 98 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual EE ae Roll Mode TDS 400A Only Roll Modes Untriggered Roll Untriggered Roll with Single Sequence Triggered Roll Triggered Roll with Single Sequence To Turn On Roll Mode Roll mode lets you see acquired data points without waiting for the acquisition of a complete waveform record For example when a sweep is 10 divisions long and the sweep rate is 1 second per division 10 seconds are required to fill the waveform record Without roll mode you must wait 10 seconds to see that the position control is set wrong With roll mode you can start seeing results almost immediately The four roll modes see Figure 3 53 are described below Use untriggered roll to continuously observe a slow process knowing that you can always see the most recent view of that process Use untriggered roll with single sequence to observe data for later viewing For example at 20 seconds per division at 30K record length there are 60 screens 600 divisions and 12000 seconds of acquired data points Untriggered roll with single sequence would capture data over a lunch hour and hold it for later viewing Use triggered roll to capture a succession of triggered events in normal interac tiv
10. CH2 lan AN sams CH 3 lt ee am a ON STBY 2 Press one of these buttons to select from main menu 3 Press one of these buttons to select from side menu if displayed 4 If side menu item has an adjustable value shown in reverse video adjust it with the general purpose knob or keypad TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual At a Glance To Operate a Pop Up Menu MS50 0us CO Scan Rate yne Polarity Negative YPE class lt Video gt lt Custon gt car amp Interlace CLEAR MENU Press Press to remove to display pop ups menus from screen Press again to make selection Alternatively press SHIFT first to make selection in the opposite direction A pop up selection changes the other main menu titles 2 10 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual SSS A O Tutorial This section quickly acquaints you with some of the fundamental operations required to use your digitizing oscilloscope to take measurements Start this tutorial by doing Setting Up for the Examples Setting Up for the Examples Perform the following tasks to connect input signals to the digitizing oscillo scope to reset it
11. cc cece cece cece cee eee eee eeee 3 89 Pulse Triggering TDS 510A Only 0 cc cece cere cere eee 3 91 Remote Communication 0 cece cece cece rere eens 3 97 Roll Mode TDS 400A Only ccc cece cece cece cece nes 3 99 Saving and Recalling Setups 0 cece cece eee eee eens 3 103 Saving and Recalling Waveforms ececeee cece eeeee 3 105 Selecting Channels 0 0 000scce00ccsssecsssccevesseeessaes 3 111 Setting Up Automatically Autoset and Reset 06 3 113 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual i Table of Contents Appendices Glossary Index Signal Path Compensation cece cece cece cece ee eeee 3 115 Taking Cursor Measurements ccececccccccecsceeces 3 117 Vertical Control 2 iii ec cic scsi tee dette ee bee ca bese eee ces 3 123 Video Triggering TDS 400A ccc cc cece cece cent ee enes 3 127 Waveform Differentiation Optional 0 cece ee ee eee 3 131 Waveform Integration Optional 0 cece cece ee eens 3 135 Waveform Math 66 0 ioc cece ib cis eve bide seee beeen ee be cence nee 3 139 ZOOM E E 0 so i5 20508 B 9 ashen A E E E L T 8an8 8 3 143 Appendix A Options and Accessories eee cece ee eecee A 1 Appendix B Packaging for Shipment cece eee B 1 Appendix C Remote Display 0 cece cece cere ree eeee C 1 Appendix D Programmer Disk cece ce
12. we Envelope acquisition mode A mode in which the oscilloscope acquires and displays a waveform that shows the variation extremes of several acquisitions Equivalent time sampling ET A sampling mode in which the oscilloscope acquires signals over many repetitions of the event The digitizing oscilloscope use a type of equivalent time sampling called random equivalent time sampling It utilizes an internal clock that runs asynchronously with respect to the input signal and the signal trigger The oscilloscope takes samples continuously independent of the trigger position and displays them based on the time difference between the sample and the trigger Although the samples are taken sequentially in time they are random with respect to the trigger Hi Res acquisition mode An acquisition mode in which the digitizing oscilloscope averages all samples taken during an acquisition interval to create a record point That average results in a higher resolution lower bandwidth waveform That mode only works with real time non interpolated sampling Holdoff trigger A specified amount of time after a trigger signal that elapses before the trigger circuit will accept another trigger signal Holdoff helps ensure a stable display Interpolation The way the digitizing oscilloscope calculates values for record points when the oscilloscope cannot acquire all the points for a complete record with a single trigger event That condition occ
13. 3 23 3 61 3 69 3 70 3 72 3 93 3 94 Class 3 69 3 92 3 94 Coupling 3 23 DC 3 23 Define Inputs 3 70 3 72 Define Logic 3 71 3 72 Edge 3 22 Either 3 93 3 94 Falling edge 3 72 Glitch 3 92 3 93 Goes FALSE 3 69 Goes TRUE 3 69 HF Rej 3 23 Holdoff 3 70 3 93 Level 3 24 3 93 3 96 LF Rej 3 23 Mode amp Holdoff 3 24 3 70 3 93 NAND 3 71 3 72 Negative 3 93 3 94 Noise Rej 3 23 NOR 3 71 3 72 Normal 3 24 3 70 3 93 OR 3 71 3 72 Pattern 3 69 Polarity 3 94 Polarity and Width 3 93 Positive 3 93 3 94 Pulse 3 92 3 94 Reject Glitch 3 93 Rising edge 3 72 Runt 3 94 Set Thresholds 3 69 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Index Set to 50 3 24 3 25 Set to ECL 3 24 Set to TTL 3 24 Slope 3 24 Source 3 23 3 93 3 94 State 3 69 3 72 Thresholds 3 94 Trigger When 3 69 3 71 True for less than 3 7 True for more than 3 7 Type 3 22 3 92 3 94 3 127 Video 3 127 Width 3 93 MAIN TRIGGER OUTPUT BNC 2 6 Math Waveform Differential A 1 FFT A 1 Integral A 1 Optional Advanced A 1 Math waveforms 3 141 Math1 2 3 More menu 3 141 Maximum 3 74 Mean 3 74 MEASURE button 3 76 Measure Delay menu Create Measrmnt 3 80 Delay To 3 79 Edges 3 80 Measure Delay To 3 79 OK Create Measurement 3 80 Measure Delay To Measure Delay menu 3 79
14. Supported Formats You can get a copy of the digitizing oscilloscope display by using the hardcopy feature This section lists hardcopy formats and describes how to setup and execute a hardcopy Different hardcopy devices use different formats The digitizing oscilloscope supports the following formats m HP Thinkjet inkjet printer m HP Deskjet inkjet printer m HP Laserjet laser printer m Seiko DPU 411 412 portable thermal printer m HPGL Color Plot m Epson m Interleaf m Tag Image File Format TIFF m PC Paintbrush PCX Microsoft Windows file format BMP Encapsulated Postscript Image Mono Plot and Color Plot Some formats particularly Interleaf Postscript TIFF PCX BMP and HPGL are compatible with various desktop publishing packages You can paste files created from the oscilloscope directly into a document when using any of those desktop publishing systems EPS Mono and Color formats are compatible with the Tektronix Phaser Color Printer HPGL is compatible with the Tektronix HC100 Plotter and Epson is compatible with the Tektronix HC200 Printer To Set Up for Making Hardcopies Before you make a hardcopy you need to set up communications and hardcopy parameters This discussion assumes that the hardcopy device is already connected to the GPIB port on the rear panel TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 47 Hardcopy To Set Communication To set up the communicatio
15. Utility Menu Roll Mode 500 Point Record Length Trigger Mode Menu Save Recall Setup Menu Save Waveform Menu TDS 400A shown More Menu Save Format Menu The Channel Readout Waveform Selection Priority Performing a Signal Path Compensation Cursor Types Cursor Modes H Bars Cursor Menu and Readouts 00 Paired Cursor Menu and Readouts Video Line and IRE Units TDS 400A shown Vertical Readouts and Channel Menu Main Trigger Menu Video Type Video Trigger Menu Class Video Trigger Menu TV Delay Mode Video Trigger Scan Parameter Video Trigger Scan Rate amp Interlace Derivative Math Waveform Peak Peak Amplitude Measurement of a Derivative Integral Math Waveform cecceeeececees H Bars Cursors Measure an Integral Math Waveform More Menu Dual Waveform Math Menus Zoom Mode with Horizontal Lock Set to None Zoom Preview Mode Equipment Needed to Run the Example Programs TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Table of Contents List of Tables vi Table 1 1 Table 3 1 Table 3 2 Table 3 3 Table 3 4 Table 3 5 Table 3 6 Table 3 7 Table A 1 Table A 2 Table A 3 Table A 4 Table A 5 Fuse and Fuse Cap Part Numbers 000 1 4 TDS 460A TDS 430A and TDS 420A Resolution Bits 3 6 TDS 510A Resolution Bits ccc cc eee eee cee 3 6 AY Format Pairs 6 6 0 s esiie dsesaivecevs
16. lt Edge gt chi Be a aM Holdoff Figure 3 13 Main Trigger Menu Edge Type To Specify Coupling To select the coupling you want press TRIGGER MENU gt Type main gt Edge pop up gt Coupling main gt DC AC HF Rej LF Rej or Noise Rej side NOTE If you select the Auxiliary trigger source select DC or HF Rej coupling DC DC passes all of the input signal In other words it passes both AC and DC components to the trigger circuit AC AC passes only the alternating components of an input signal above 30 Hz It removes the DC component from the trigger signal atat HF Rej removes the high frequency portion of the triggering signal That allows only the low frequency components to pass on to the triggering system High frequency rejection attenuates signals above 30 kHz TTT LF Rej does the opposite of high frequency rejection Low frequency rejection attenuates signals below 80 kHz TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 23 Edge Triggering Noise Rej provides lower sensitivity It requires additional signal amplitude for stable triggering reducing the chance of falsely triggering on noise To Set Slope To select the slope that the edge trigger occurs on 1 Press the TRIGGER MENU gt Type main gt Edge pop up gt Slope main A 2 Select the rising or falling edge from the side menu pa To Set Level Press the TRIGGER MENU gt Typ
17. 11 3 14 How to set up 3 12 Delayed Trigger menu 3 12 Chl Ch2 3 13 Coupling 3 14 Delay by 3 13 Delay by Events 3 13 Delay by Time 3 13 Falling edge 3 14 Level 3 14 Rising edge 3 14 Slope 3 14 Source 3 13 DELAYED TRIGGER OUTPUT BNC 2 6 Delayed Triggerable Horizontal menu 3 12 3 59 Delete Refs Save Recall Waveform menu 3 106 Delete File Utilities menu 3 44 Derivative math waveform procedure for displaying 3 3 procedure for measuring 3 32 3 133 Deskjet 3 47 Deskjet Hardcopy menu 3 48 Differentiation waveform 3 3 Digitizing Glossary 1 Digitizing rate 1 1 Disk How to save a hardcopy to 3 51 Disk drive 3 43 Display 2 7 3 113 Options 3 17 3 20 Record View 3 22 Display T Trigger Point Display menu 3 18 DISPLAY button 3 17 Display menu 3 17 Contrast 3 18 Cross Hair 3 19 Display T Trigger Point 3 18 Dots 3 17 Dots style 3 64 Filter 3 19 Format 3 20 Frame 3 19 Full 3 19 Graticule 3 19 Grid 3 19 Infinite Persistence 3 18 Intensified Samples 3 17 Intensity 3 18 Linear interpolation 3 19 NTSC 3 19 Overall 3 18 PAL 3 19 Readout 3 18 Sin x x interpolation 3 19 Style 3 17 Text Grat 3 18 Trigger Bar 3 18 Variable Persistence 3 18 Vectors 3 17 Waveform 3 18 XY 3 20 YT 3 20 Display Status menu 3 15 Dots 3 17 Dots style Display menu 3 64 Dots Display menu 3 17 TDS 420A TD
18. 3 112 Chl Ch2 Delayed Trigger menu 3 13 Chl Ch2 Main Trigger menu 3 23 3 61 3 69 3 70 3 72 3 93 3 94 Chl Ch2 Video Trigger menu 3 128 Change Math waveform definition More menu 3 139 Channel 3 111 3 112 Readout 2 7 3 111 3 143 Reference Indicator 2 7 3 111 Selection buttons 2 18 3 111 3 112 Index 2 Class Main Trigger menu 3 69 3 92 3 94 CLEAR MENU button 2 3 2 10 2 14 2 23 3 80 Clear Spool Hardcopy menu 3 50 Clipping derivative math waveforms 3 33 FFT math waveforms 3 35 how to avoid 3 35 3 133 3 138 integral math waveforms 3 138 Clock Horizontal menu 3 59 Compare Ch1 to Acquire menu 3 65 Compare Ch2 to Acquire menu 3 65 Compensation 3 89 Configure Utility menu 3 48 3 97 Confirm Delete File Utilities menu 3 45 Connector AUX TRIGGER INPUT 2 6 DELAYED TRIGGER OUTPUT 2 6 GPIB 2 6 MAIN TRIGGER OUTPUT 2 6 SIGNAL OUTPUT 2 6 Contrast Display menu 3 18 Conventions x Copy File Utilities menu 3 45 Coupling 2 19 Coupling Delayed Trigger menu 3 14 Coupling Main Trigger menu 3 23 Coupling Vertical menu 3 124 Create Directory File Utilities menu 3 45 Create Limit Test Template Acquire menu 3 63 Create Measrmnt Measure Delay menu 3 80 Cross Hair Display menu 3 19 Cursor Horizontal bar 3 117 Paired 3 117 Vertical bar 3 117 CURSOR button 3 118 Cursor menu 3 31 3 118 3 1
19. 3 57 Trigger Status Lights 3 21 Trigger When Main Trigger menu 3 69 3 71 Trigger delayed How to set up 3 12 Trigger Status menu 3 15 True for less than Main Trigger menu 3 7 True for more than Main Trigger menu 3 71 Tutorial 2 11 TV Delay Mode Video Trigger menu 3 128 Type Main Trigger menu 3 22 3 92 3 94 3 127 U user Saved setup status 3 103 UTILITY button 3 48 3 97 Utility Menu OK Erase Ref amp Panel Memory 3 104 Tek Secure Erase Memory 3 104 Utility menu 3 47 3 97 Configure 3 48 3 97 GPIB 3 97 Hardcopy 3 98 Hardcopy Talk Only 3 48 T O 3 48 3 97 Off Bus 3 98 Port 3 97 System 3 48 3 97 Talk Listen Address 3 97 V V Limit Acquire menu 3 64 Variable Persistence Display menu 3 18 Vectors 3 17 Vectors Display menu 3 17 Vertical 3 113 Bar cursors 3 117 Control 3 123 Offset 3 125 Readout 3 123 Scale 3 123 SCALE knob 2 15 3 123 System 2 15 Vertical Menu Cal Probe 3 83 Vertical menu 100 MHz 3 125 20 MHz 3 125 Bandwidth 3 125 Coupling 3 124 Fine Scale 3 125 Full 3 125 Offset 3 125 Position 3 125 Set to Zero 3 125 VERTICAL MENU button 2 19 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Index 11 Index Vertical position for DC correction of FFTs 3 35 Vertical POSITION knob 3 144 Vertical Readout 3 123 Vertical SCALE knob 3 144 VGA display C 1 Vid
20. If you select the 120K record length on a TDS 400A then you can only save one reference waveform Also you can only use display four waveforms For example if you display a math waveform that is the sum of CH I and CH 2 even if CH I and CH 2 are not displayed you have used three waveforms Therefore you can only display one additional waveform Do the following steps to first display and then remove waveforms from the display 1 Press CH 1 CH 2 CH 3 or CH 4 to turn on as many of these channels as desired The one you select last becomes the selected channel Selecting a channel turns it on if it is not already on 2 To turn OFF the display of the selected waveform press the WAVEFORM OFF button 3 To select a math waveform or a reference waveform press MORE and select the waveform from the More menu To remove the display of the waveform selected in the More menu press WAVEFORM OFF while the MORE button is lit Waveform Priority When you turn off a waveform the digitizing oscilloscope automatically selects the next highest priority waveform see Figure 3 60 1 CH1 All models 2 CH2 All models 3 CH3 TDS 420A TDS 460A and TDS 510A 4 CH4 TDS 420A TDS 460A and TDS 510A 5 MATH1 6 MATH2 7 MATH3 8 REF1 9 REF2 10 REF3 11 REF4 Figure 3 60 Waveform Selection Priority 3 112 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual rr Ae Setting Up Automatically Autoset and Reset The
21. Select the Cursor Function The cursor readouts differ depending on whether you are using H Bars V Bars or Paired H Bars The value after A shows the voltage difference between the cursors The value after shows the voltage of the selected cursor relative to ground see Figure 3 64 With video triggers you can display the voltage in IRE units V Bars The value after A shows the time or frequency difference between the cursors The value after shows the time frequency of the selected cursor relative to the trigger point With video triggers you can display the line number Paired The value after one A shows the voltage difference between the two Xs the other A shows the time or frequency difference between the two long vertical bars The value after the shows the voltage at the X of the selected cursor relative to ground see Figure 3 65 If the paired cursors are moved off screen horizontally Edge replaces the voltage values in the cursor readout Do this procedure and those that follow to take a cursor measurement To select the type of cursors you want do the following steps 1 To display the cursor menu press CURSOR see Figure 3 64 2 Press CURSOR gt Function main gt H Bars V Bars Paired or Off side TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Taking Cursor Measurements Tek Run 100kKS 5 Sample Cursor Readout H Bars Fanan SelectedCursor SolidLine
22. and to become acquainted with its display screen Once completed these tasks ready the digitizing oscilloscope for use in the examples that follow Connect the Input Signal Remove all probes and signal inputs from the input BNC connectors along the lower right of the front panel Then using one of the probes supplied with the digitizing oscilloscope connect from the CH 1 connector of the digitizing oscilloscope to the Probe Compensation connector Figure 2 1 TDS 400A TDS 510A Figure 2 1 Connecting a Probe for the Examples TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 2 11 Tutorial Reset the Oscilloscope Do the following steps to reset the digitizing oscilloscope to a known factory default state Reset the oscilloscope anytime you begin a new task and need to start fresh with known default settings 1 Press the save recall SETUP button to display the Setup menu see Figure 2 2 SAVE RECALL APPLICATION MENU ACQUIRE MENU WAVEFORM MEASURE HARDCOPY RUN STOP STATUS utitity HELP SETUP CURSOR DISPLAY O SHIFT SETUP Button Sc gt CO Figure 2 2 SETUP Button Location The digitizing oscilloscope displays main menus along the bottom of the scree
23. gt WAIN LEVEL A NO N 0 e A y fe Q N 0 Q N ae TRIG D c gt O READY SINGLE TRIG O ARM FORCE TRIG 300 V CAT 1 1Mo15pt soa CH2 ssop I evAMS CH3 2 Press one of these buttons to select from main menu 3 Press one of these buttons to select from side menu if displayed 4 If side menu item has an adjustable value shown in reverse video adjust it with the general purpose knob 2 8 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual At a Glance To Operate a Menu TDS 510A 1 Press front panel menu button Press SHIFT first if button label is blue APPLICATION CO UTILITY SHIFT CURSOR DISPLAY ia CAL ER A HORIZONTAL AGGERG Postoni e HORIZONTAL MENU lt 4 SCALE gt n 300 CATE NENU ACQUIRE MEASURE HARDCOPY RUN STOP SINGLE TRIG FORCE TRIG Co FOUR CHANNEL 500 MH Tektronix TDS 510A saiiandoscuoscore 500 MSis Tek Run 5 00GS s ET Sample Trigger Level 4mV G 1 ave 0 CH1 an CO Set to TTL 0 CH2 E E Set to ECL CH3 Set to 50 CH4 200mV M10 0ns Chi f 4mv m MORE de source Coupling slope eve m Type amp lt Edge gt chi ee a G Holdoff A j
24. press the side menu OK Accept item See Figure 3 25 Tek Run 100kKS 5 Sample Enter Label Name f OK ECDEFGHI KLMNOPQRSTUVWAYZ0123456789 amp Accept Enter Char ae Delete Clear Ololololololo OlolIlolIolo Figure 3 25 File System Labelling Menu TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual File System To Copy a File or Directory To copy a file or directory turn the general purpose knob until it scrolls the cursor over the name of the file to copy Then press the side menu Copy button The file menu reappears with the names of directories to copy to Select a directory and press the side menu button labelled Copy lt name gt to Selected Directory To copy all files select the entry The digitizing oscilloscope copies a directory and all its contents To Print a File or Directory To Create a Directory To Set Confirm Delete To Set Overwrite Lock To print a file turn the general purpose knob until it scrolls the cursor over the name of the file to print Then press the side menu Print button The Print To side menu should appear Select the port to print to from GPIB RS 232 or Centronics See Figure 3 25 Then the digitizing oscilloscope sends the file in its raw form out the port To create a new directory press the side menu Create Directory button The labelling men
25. the status message is updated to Pass or Fail 5 Verify the word Pass appears under Signal Path in the main menu See Figure 3 61 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 115 Signal Path Compensation Tek Run 100kS 5 Sample Signal Path ompensatio Poi ener Y Signal Path Compensation SPC corrects for DC inaccuracies caused by ambient temperature variations and or long term drift SPC can be run at any time after the instrument is My and should be run whenever the Instrument s ambient temperature has changed by more than 5 C Config A rsely y input signals OK O eee seiesi aes o v remove these signals prior to running SPC Compensate Diag E Signal Paths ignal oltage ow Freq High Freq rigger System Path Reference Response Response Skew lt Cal gt P Pass Pass Pass Pass Ololololo LLOlO oOlololo Figure 3 61 Performing a Signal Path Compensation 3 116 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual a Taking Cursor Measurements Use the cursors to measure the difference either in time or voltage between two locations in a waveform record This section describes cursors how to select their type and mode how to display them and how to use them to take measurements Description Cursors are two markers that you position with the general purpose kno
26. you scale only the selected waveform A HORIZONTAL lt POSITION gt HORIZONTAL MENU eg lt SCALE gt Figure 3 31 Horizontal Controls When you use the horizontal POSITION knob and select a channel you position all channel reference and math waveforms displayed at the same time when Horizontal Lock is set to All in the Zoom menu For more information on zoom see page 3 143 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Horizontal Control To Change Horizontal Parameters Trigger Position Record Length To set the record length set the trigger position and change the position or scale use the Horizontal menu The Horizontal menu also lets you select either a main or delayed view of the time base for acquisitions To define how much of the record is pretrigger and how much posttrigger information use the Trigger Position menu Press HORIZONTAL MENU gt Trigger Position main gt Set to 10 Set to 50 or Set to 90 side or press Pretrigger side and use the general purpose knob to change the value The number of points that make up the waveform record is defined by the record length To set the waveform record length 1 press HORIZONTAL MENU gt Record Length main The side menu lists various discrete record length choices 2 To fit all or most of an acquired waveform to the visible screen regardless of record length press HORIZONTAL MENU gt Record Length main Then
27. 016 1236 00 Oscilloscope Camera C9 Oscilloscope Camera Adapter 016 1154 00 Soft Sided Carrying Case TDS 400A 016 1158 01 TDS 510A 016 0909 01 TransitCase TDS 400A 016 1157 00 TDS 510A 016 1135 01 GPIB Cable 1 meter 012 0991 01 GPIB Cable 2 meter 012 0991 00 TDS 400A only Printer Pack with Seiko DPU 411 printer and TDS4F5P accessory pouch Pouch includes mounting plate TDS 400A 016 1159 00 TDS 510A 016 1268 00 VGA Cable Required to meet all emissions specifications CTL3VGAMM 5 LCOM part number Table A 4 lists an optional accessory amplifier and probes recommended for use with your digitizing oscilloscope Probe Type Tektronix Model Description Passive high impedance voltage P6138A TDS 400A 10X 400 MHz P6139A TDS 510A 10X 500 MHz P6101B 1X 15 MHz Passive SMD P6563A 20X 500 MHz Passive low impedance Zo P6156 10X 3 5 GHz for 50 Q inputs 1X 20X 100X optional Passive high voltage P5100 100X 2 5 kV DC peak AC P6015A 1000X 20 kV DC peak AC Active high speed voltage P6243 DC to 1 GHz FET TekP robe powered P6204 DC to 1 GHz FET DC Offset capability requires Tektronix 1103 TekP robe Power Supply for offset capability Active differential voltage P6046 1X 10X 250 V DC to 100 MHz P5205 50X 500X 1300 V DC to 100 MHz A 4 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Appendix A Options and Accessories Table A 4 Compatible Probes Cont Probe Type Current L
28. 1 Acquire menu 3 8 3 63 Average 3 8 Compare Ch1 to 3 65 Compare Ch2 to 3 65 Create Limit Test Template 3 63 Envelope 3 8 H Limit 3 64 Hardcopy if Condition Met 3 65 Hi Res 3 8 Limit Test 3 65 Limit Test Condition Met 3 65 Limit Test Setup 3 65 Limit Test Sources 3 65 Mode 3 8 OFF Real Time Only 3 8 OK Store Template 3 64 ON Enable ET 3 8 Peak Detect 3 8 Repetitive Signal 3 8 Ring Bell if Condition Met 3 65 RUN STOP 3 9 Sample 3 8 Single Acquisition Sequence 3 10 Stop After 3 9 3 65 Stop After Limit Test Condition Met 3 65 Template Source 3 63 V Limit 3 64 ACQUIRE MENU button 3 8 3 63 Acquisition 3 113 Glossary 1 Interval Glossary 1 Modes Average 3 7 Envelope 3 7 Hi Res 3 5 Peak detect 3 5 Sample 3 5 Readout 3 7 Active cursor Glossary 1 active Saved waveform status 3 105 Aliasing 3 36 3 58 Amplitude 3 73 Amplitude Units Cursor menu 3 121 AND Main Trigger menu 3 68 AND Main Trigger menu 3 71 3 72 Applications FFT math waveforms 3 27 integral math waveforms 3 35 Area 3 73 Attenuation Glossary 1 Auto trigger mode 3 24 Auto Main Trigger menu 3 24 3 70 3 93 Automated Measurements Snapshot of 2 25 Automated measurements 2 22 3 73 of derivative math waveforms 3 32 procedure 3 32 of FFT math waveforms 3 33 of integral math waveforms 3 38 Automatic trigger mode Glossary 1 Autoset 2
29. 16 3 113 How to execute 3 113 AUTOSET button 2 16 3 113 AUX TRIGGER INPUT BNC 2 6 Average acquisition mode 3 7 Glossary 1 Average Acquire menu 3 8 Bandwidth 1 1 3 124 Glossary 1 Bandwidth Vertical menu 3 125 Banner menu 3 16 Base Cursor menu 3 121 Before you begin 1 5 1 6 Blackman Harris window 3 30 BMP 3 47 BMP Color Hardcopy menu 3 48 BMP Mono Hardcopy menu 3 48 BNC AUX TRIGGER INPUT 2 6 DELAYED TRIGGER OUTPUT 2 6 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Index 1 Index MAIN TRIGGER OUTPUT 2 6 SIGNAL OUTPUT 2 6 Burst width 3 73 Button ACQUIRE MENU 3 8 3 63 AUTOSET 2 16 3 58 3 113 CLEAR MENU 2 3 2 10 2 14 2 23 3 80 CURSOR 3 118 DELAYED TRIG 3 12 DISPLAY 3 17 FORCE TRIG 3 25 HARDCOPY 3 43 3 48 3 98 HELP 3 3 HORIZONTAL MENU 3 12 MEASURE 3 76 MORE 3 106 3 111 3 112 3 139 ON STBY 1 5 2 3 Save Recall SETUP 2 12 3 43 3 103 Save Recall WAVEFORM 3 43 3 105 SELECT 3 120 SET LEVEL TO 50 3 25 SINGLE TRIG 3 10 3 25 3 26 STATUS 3 15 TRIGGER MENU 3 22 3 69 3 92 3 94 3 127 UTILITY 3 48 3 97 VERTICAL MENU 2 19 WAVEFORM OFF 2 21 3 20 3 112 ZOOM 3 144 3 146 Buttons CH1 CH2 3 111 3 112 Channel selection 2 18 3 111 3 112 Main menu 2 3 Side menu 2 3 C Cables 3 97 Cal Probe Vertical menu 3 83 Cart Instrument A 3 K212 A 1 Centronics Port optional 3 97 CH1 CH2 buttons 3 111
30. 420A TDS 460A and TDS 510A only If you press the WAVEFORM OFF button for an XY channel the digitizing oscilloscope deletes the XY graph of of the channels Since selecting YT or XY affects only the display the horizontal and vertical scale and position knobs and menus control the same parameters regardless of the mode selected Specifically in XY mode the horizontal scale continues to control the time base and the horizontal position continues to control which portion of the waveforms are displayed XY format is a dot only display although it can have persistence The Vector style selection has no effect when you select XY format You cannot display Math waveforms in XY format They disappear from the display when you select XY TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual SSS Edge Triggering An edge trigger event occurs when the trigger source passes through a specified voltage level the trigger level in a specified direction the trigger slope You will likely use edge triggering for most of your measurements This section describes how to use edge triggering It also explains how to select the trigger mode auto or normal for all trigger types To Check Edge Trigger Status To quickly check if edge triggers are selected check the Trigger readout When edge triggers are selected the trigger readout displays the trigger source as well as the trigger slope and level see Figure 3 11 Main Trigger Slop
31. 43 Q Q File System p 0 U Q ON STBY ON STBY Switch Main Menu Buttons CLEAR MENU Removes page 1 4 page 2 8 Menus from the Display TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 2 3 At a Glance Front Panel Map Right Side TDS 400A Saving and Recalling Waveforms Saving and Recalling Setups page 3 103 page 3 105 Reset the Oscilloscope page 2 12 Measurement Help page 3 3 Autoset File System System Hardcopy Status page 3 15 page 3 113 page 3 43 page 3 73 page 3 47 y s aga Acquisition Modes Aa page 3 5 Y MENU ACQUIRE MENU VEDAT APPLICATION impon EA n Cursor Measurements CURSOR DISPLAY page 3 117 Selecting Channels a RANTAN A TRIGGER _ Shift when lit selects alternate page 3 111 menus printed in blue and coarse knob speed HORIZONTAL TRIGGER Display Modes page 3 17 MENU MENU Remote Communication page 3 97 O MORE WaveformMath 3S lt soate gt Sede O TRIVD page 3 139 WAVEFORM OFF f N RemovingWaveforms page 3 111 Oreo Ground L wn Ch Probe Compensation page 3 89 Vertical Control Zoom Horizontal Control Triggering page 3 25 page 3 123 page 3 143 page 3 55 Delay Triggering page 3 11 Edge Triggering page 3 21 Video Triggeri
32. 430A TDS 460A amp TDS 510A User Manual 3 101 Roll Mode Holdoff 0 Tek Single Seq 500 S s Mode amp Holdoff oa Auto Untrig d f Rol Normal Trig d Roll RollTriggerM ode Indicators 100mY i M 100ms Chi 142mY Source Coupling Slope Level REG TYPE amp lt Edge gt chi DE T 42mvV Holdoff O Ololololololo Figure 3 54 Trigger Mode Menu 3 102 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual SS Le Saving and Recalling Setups To Save a Setup To Recall a Setup Your digitizing oscilloscope can store up to ten oscilloscope setups in internal memory that you may later recall This section describes how you save and recall a setup and how you can recall the factory default setup To save the current setup of the digitizing oscilloscope 1 Press SETUP gt Save Current Setup main STOP Before doing step 2 that follows note that if you choose a setup location labeled user you will overwrite the user setup previously stored there 2 To store a setup internally choose one of the ten storage locations from the side menu To Setup 1 To Setup 2 see Figure 3 55 Now the current setup is stored in that location 3 To store a setup to disk press To File Then use the general purpose knob to select the exact file from the resulting scrollbar list Finally
33. 74 Persistence 3 18 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Index Phase 3 74 Phase suppression 3 38 Pixel Glossary 2 Polarity and Width Main Trigger menu 3 93 Polarity Main Trigger menu 3 94 Pop up menu 2 10 Glossary 2 Port Hardcopy menu 3 48 Port Utility menu 3 97 Portrait Hardcopy menu 3 48 Pos Sync Video Trigger menu 3 128 Position vertical 3 34 3 133 3 138 Position Vertical menu 3 125 Positive duty cycle 3 74 Positive overshoot 3 75 Positive width 3 75 Positive Main Trigger menu 3 93 3 94 Postscript 3 47 Posttrigger Glossary 3 Power connector 1 3 Power cords A 1 A 2 Power off 1 5 Power on 1 4 Pretrigger Glossary 3 Preview Zoom menu 3 145 Principal power switch 1 4 2 6 Print File Utilities menu 3 45 Probe Cal 1 5 3 83 3 88 Probes Accessories A 4 Calibration 3 83 Compensation 2 15 3 89 Glossary 3 Connection 2 11 Passive 3 89 Programmer manual D 1 Programming GPIB D 1 Programming Examples D 1 Propagation delay 3 73 Pulse trigger 3 91 Pulse Main Trigger menu 3 92 3 94 Q Quantizing Glossary 3 R Rack mounting A 1 Rate 1 Video Trigger menu 3 129 Rate 2 Video Trigger menu 3 129 Rate 3 Video Trigger menu 3 129 Rate 4 Video Trigger menu 3 129 Readout Acquisition 3 7 Channel 2 7 3 111 3 143 Cursors 2 7 Edge trigger 3 21 3 67 General purpose knob 2 7
34. All Measurements side Gate Measurements The gating feature lets you limit measurements to the portion of the waveform between cursors the gated region When gating is Off the oscilloscope makes measurements over the entire waveform record When gating is ON vertical cursors are displayed Use these cursors to define the gated region Do the following steps to gate a measurement 1 Press MEASURE gt Gating main gt Gate with V Bar Cursors side see Figure 3 40 2 Move the cursors to the area of the waveform of interest Displaying the cursor menu and turning V Bar cursors off does not turn gating off Gating arrows remain on screen to indicate the area over which the measurement is gated You must turn gating off in the Gating side menu NOTE Cursors are displayed relative to the selected waveform If you are making a measurement using two waveforms this can cause confusion If you turn off horizontal locking and adjust the horizontal position of one waveform the cursors appear at the requested position with respect to the selected waveform Gated measurements remain accurate but the displayed positions of the cursors change when you change the selected waveform TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 77 Measuring Waveforms Define High Low Setup Define Reference Levels 3 78 Tek Run 100kS s S A 2 03ms 1 23ms C tht Ampi 304mV i Gate with V B
35. All Setups and Waveforms Tek Secure To use Tek Secure to remove all stored setups and waveforms does not affect mass storage disk Press SHIFT UTILITY System main gt Config pop up gt Tek Secure Erase Memory main gt OK Erase Setup amp Ref Memory side Executing Tek Secure accomplishes the following tasks m Replaces all waveforms in reference memories with zero sample values m Replaces all setups with the factory setup m Verifies successful completion of setup and waveform erasure m Displays an unsuccessful or successful completion message 3 104 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual SSS aaa Saving and Recalling Waveforms To Save a Waveform You can store a waveform in any of the four internal reference memories or to the floppy disk This section describes how to save delete and display reference waveforms NOTE If you select the 120K record length on a TDS 400A then you can only save one reference waveform Also you can only use display four waveforms For example if you display a math waveform that is the sum of CH 1 and CH 2 even if CH I and CH 2 are not displayed you have used three waveforms Therefore you can only display one additional waveform The digitizing oscilloscope can display up to 11 waveforms at one time That includes waveforms from the input channels four reference waveforms and three math waveforms You can save any combination of different s
36. At a Glance Rear Panel Map Centronics RS 232 GPIB Connector Connector Connector Optional Optional Power Principal Fuse Connector Power Switch page 1 3 page 1 3 page 1 5 Power Fuse Connector page 1 3 page 1 3 KS Y i U POV m oN MorF Beloa BOD VIDEO VGA AUX TRIGGER EXT CLOCK Serial Compatible P rovides Auxiliary Trigger Number Connector page C 1 and External Clock Input Principal Centronics Power Switch Connector RS 232 Connector page 1 3 Optional Optional GPIB Connector Fuse Serial Power Connector Security Bracket page 1 3 Number page 1 3 TDS 510A 2 6 TDS 400A B080000 Up VGA Output Monochrome Rear Panel Connectors SIGNAL OUTPUT Provides CH3 analog signal output AUX TRIGGER INPUT Provides auxiliary trigger signal input MAIN TRIGGER OUTPUT Provides main trigger TTL output DELAYED TRIGGER OUTPUT Provides delayed trigger TTL output TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual At a Glance Display Map When pres
37. DC components of an input signal AC coupling shows only the alternating components of an input signal GND ground coupling disconnects the input signal from the acquisition Q input impedance lets you select either 1 MQ or 50 Q impedance NOTE If you select 50 Q impedance with AC coupling the digitizing oscillo scope will not accurately display frequencies under 200 kHz Also when you connect an active probe to the oscilloscope the oscilloscope sets the input impedance to 50 Q and the input coupling to AC If you then connect a passive probe you need to set the input impedance back to 1 MQ Bandwidth refers to the range of frequencies that an oscilloscope can acquire and display accurately that is with less than 3 dB attenuation To select the upper TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Vertical Control limit for the higher frequency components change the bandwidth of the selected channel Press VERTICAL MENU gt Bandwidth main gt Full 100 MHz or 20 MHz side Fine Scale To make fine adjustments to the vertical scale press VERTICAL MENU gt Fine Scale main and use the general purpose knob to adjust the vertical scale Position To adjust the vertical position to a specific number of divisions press VER TICAL MENU gt Position main and use the general purpose knob to set vertical position If you want to reset the reference point of the selected waveform to the center of the d
38. ER2 inte chi MIDIDIDIca Ololololololoj Figure 3 73 Derivative Math Waveform Automated Measurements Do the following steps to display automated measurements of the waveform of a Derivative Waveform Be sure MORE is selected in the channel selection buttons and that the differentiated math waveform is selected in the More main menu 2 Press MEASURE gt Select Measrmnt main 3 Select up to four measurements in the side menu see Figure 3 74 3 132 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Waveform Differentiation kunning 5 00MS S Average Select Measurement M1 PK PkK 446KV 5 1 Amplitude Positive Overshoot be ih Si E ENEE EREE E TEE PEE E EEA Negative Overshoot chi 200m M10 0Ms Chi F more s i 5of7 DEUDE 100kv s 10 0us elec a igh tow a i a Remove Gating Reference Measrmnt Setup Snapshot Arapa easrmnt OFF Histogram Levels O O O Oooo Figure 3 74 Peak Peak Amplitude Measurement of a Derivative Waveform Cursor Measurement of a You can also use cursors to measure derivative waveforms Use the same Derivative Waveform procedure as is found under Cursor Measurements of an Integral Waveform on page 3 136 When using that procedure note that the amplitude measurements on a derivative waveform will be in volts
39. Figure 2 18 Save Recall Setup Menu cece eee eeee 2 27 Figure 3 1 Initial Help Screen 0 cece eee eee eee 3 3 Figure 3 2 Acquisition Menu and Readout 0005 3 8 Figure 3 3 Acquire Menu Stop After eee eens 3 9 Figure 3 4 Delayed Runs After Main 0 e cece eeee 3 11 Figure 3 5 Delayed Triggerable 0 cee eee cece cece 3 11 Figure 3 6 Delayed Trigger Menu TDS 400A shown 3 14 Figure 3 7 Status Menu System TDS 400A shown 3 15 Figure 3 8 Banner Display ce cece cece cere rec eeee 3 16 Figure 3 9 Display Menu Style 0 cece eee renee 3 17 Figure 3 10 Trigger Point and Level Indicators 3 19 Figure 3 11 Edge Trigger Readouts cccceeceeceees 3 21 Figure 3 12 Record View Trigger Position and Trigger Level Bar Readouts s s 500106 0 ia s eas Ga sie ois 6 8 Ss 8a ots SSeS 3 22 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual iii Table of Contents Figure 3 13 Main Trigger Menu Edge Type 3 23 Figure 3 14 TRIGGER Controls and Status Lights 3 26 Figure 3 15 System Response to an Impulse 0 3 28 Figure 3 16 Define FFT Waveform Menu 2ee00 3 29 Figure 3 17 FFT Math Waveform in Math 4 3 31 Figure 3 18 Cursor Measurement of an FFT Waveform 3 32 Figure 3 19 Wa
40. HELP again to re enter help mode Help Mode is on Press HELP to exit Press any button or turn any Knob for information about that control Changing a control while in help mode does not affect the digitizing oscilloscope settings Press HELP again to exit the help mode Press the SHIFT button before pressing front panel buttons that display help screens for shifted menus Acquire Application Hardcopy Delayed Trigger Single Trigger Status and Utility menus With Help off press S FF lighted when on before turning the general purpose horizontal position or vertical position knobs when you want increased knob response Less knob rotation produces greater changes in settings with Help off press SHIFT after pressing any menu button that toggles through multiple settings such as those for pop up menus Pressing SHIFT reverses the direction in which the pop up menu or button label toggles through the menu or parameter settings Si 100mVv M 500us Chi O C C O C o an Figure 3 1 Initial Help Screen TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Accessing Help 3 4 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 7 2 Acquisition Modes Description of Modes Sample Mode a le Peak Detect Mode jig Hi Res Mode The acquisition system has several options for converting analog data into digital f
41. Measure menu 3 76 3 81 Gating 3 77 High Ref 3 79 High Low Setup 3 78 Histogram 3 78 Low Ref 3 79 Mid Ref 3 79 Mid2 Ref 3 79 Min Max 3 78 Reference Levels 3 78 Remove Measrmnt 3 76 3 81 Select Measrmnt 3 76 3 79 Set Levels in units 3 78 Snapshot 3 81 Measurement Amplitude 3 73 Area 3 73 Burst width 3 73 Cycle area 3 73 Cycle mean 3 73 Cycle RMS 3 73 Delay 3 79 Duty cycle 2 23 Fall time 3 74 Frequency 2 23 3 74 High 3 74 Low 3 74 Maximum 3 74 Mean 3 74 Minimum 3 74 Negative duty cycle 3 74 Negative overshoot 3 74 Negative width 3 74 Peak to peak 3 74 Period 3 74 Phase 3 74 Positive duty cycle 3 74 Positive overshoot 3 75 Positive width 3 75 Propagation delay 3 73 Readout 3 75 Reference levels 2 24 Rise time 2 23 3 75 RMS 3 75 Width 2 23 Measurement Accuracy Ensuring maximum 3 amp 3 3 88 amp 3 115 Measurements 3 73 3 82 Automated 2 22 Cursor 3 117 Gated 3 77 Graticule 3 82 Snapshot of 3 81 Memory Waveform 3 106 Menu Acquire 3 8 3 63 Banner 3 16 Cursor 3 118 Delayed Trigger 3 12 Display 3 17 File Utilities 3 43 Horizontal 3 12 Main 2 7 Main Trigger 3 22 3 69 3 92 3 94 Measure 3 76 3 81 More 3 28 3 106 3 131 3 139 See also More menu Operation 2 8 2 9 Pop up 2 10 Glossary 2 Save Reca
42. Readouts Examine the Measurement Reference Levels af General Purpose Knob To remove measurements you no longer want displayed Press MEASURE Remove Measrmnt main gt Measurement 1 Measure ment 2 and Measurement 4 side to remove those measurements Leave the rise time measurement displayed To examine the current values Press Reference Levels main gt High Ref side Tek Run 100KS 5 Sample High Ref 90 Setting and Readout General Purpose Set Levels in units Knob Icon Highlighted Menu Item with Boxed Low resolution Readout Value Change the Measurement Reference Levels ea 2 24 200mv M 500s Chir 276mv See rene ee ee ee ee so Yate ale 50 Select High Low F Remove Gating Reference Measrmnt Setup Snapshot forech Measrmnt OFF Histogram Levels Ololololo CO Co Co CO Figure 2 16 General Purpose Knob Indicators By default the measurement system uses the 10 and 90 levels of the waveform for taking the rise time measurement You can change these values to other percentages or change them to absolute voltage levels To examine the current values press Reference Levels main gt High Ref side The general purpose knob is now set to adjust the high reference level Fig ure 2 16 TDS 420A TDS 430A T
43. TDS 510A User Manual 3 73 Measuring Waveforms Table 3 5 Measurement Definitions Cont Name Fall Time Definition Timing measurement Time taken for the falling edge of the first pulse in the waveform or gated region to fall from a High Ref value default 90 to a Low Ref value default 10 of its final value Frequency Timing measurement for the first cycle in the waveform or gated region The reciprocal of the period Measured in Hertz Hz where 1 Hz 1 cycle per second High The value used as 100 whenever High Ref Mid Ref and Low Ref values are needed as in fall time and rise time measurements Calculated using either the min max or the histogram method The min max method uses the maximum value found The histogram method uses the most common value found above the mid point Measured over the entire waveform or gated region Low Maximum Mean Minimum Negative Duty Cycle Negative Overshoot Negative Width Peak to Peak Period The value used as 0 whenever High Ref Mid Ref and Low Ref values are needed as in fall time and rise time measurements May be calculated using either the min max or the histogram method With the min max method it is the minimum value found With the histogram method it refers to the most common value found below the mid point Measured over the entire waveform or gated region Voltage measurement The maximum amplitude Typically the mos
44. UME 90 0 2 50kHz 12 35 14 Ololololololo Figure 3 15 System Response to an Impulse To obtain an FFT of your waveform Operation 1 2 3 4 5 3 28 Connect the waveform to the desired channel input and select that channel Adjust the vertical and horizontal scales and trigger the display or press AUTOSET The topic Offset Position and Scale on page 3 34 provides information about optimizing your setup for FFT displays Press MORE to access the menu for turning on math waveforms Select a math waveform Your choices are Math1 Math2 and Math3 main If the selected math waveform is not FFT press Change Math Definition side gt FFT main See Figure 3 16 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Fast Fourier Transforms kunning 25 0MS s sample Define FFT Waveform Set FFT Source to chi Set FFT Vert Scale to dB RMS Select the type of Math function to define from the bottom row of bezel buttons Define the new function using the side buttons Create Math Wim Press CLEAR MENU to return to the More menu without creating a Math waveform ingle Wim Dual wim Math Math es Set FFT Window to Black Harris When you are satisfied with the selections press Suppress hase at amplitudes lt 35dB OK Create Math wim OOOO O
45. Units a T1 ie Base 1 Base mimic E Line Number Oooo Horiz Function Units Video Line Paired Ololololololoj Figure 3 66 Video Line and IRE Units TDS 400A shown Select Amplitude Units If you have option 05 Video Trigger and are measuring NTSC signals you can choose to display vertical readings in IRE units see Figure 3 66 To switch between IRE and base cursor units do the following steps 1 Press CURSOR Amplitude Units main gt IRE NTSC 2 To return to normal press CURSOR Amplitude Units main Base Select Cursor Speed To change the cursors speed press SHIFT before turning the general purpose knob The cursors move faster when the SHIFT button is lighted and the display reads Coarse Knobs in the upper right corner TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 121 Taking Cursor Measurements 3 122 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Se Vertical Control You can control the vertical position and scale of the selected waveform using the vertical menu and knobs To Change Vertical Scale and Position By changing the vertical scale you can focus on a particular portion of a waveform By adjusting the vertical position you can move the waveform up or down on the display That is particularly useful when you are comparing t
46. User Manual Index Grid Display menu 3 19 ground coupling 3 124 GROUP 1 GROUP 2 buttons 3 144 H H Bars Cursor menu 3 118 3 120 H Limit Acquire menu 3 64 Hamming window 3 30 Hanning window 3 30 Hardcopy 3 47 3 54 How to print controller 3 51 How to print no controller 3 49 How to save to disk 3 51 Spool 3 50 Hardcopy Talk Only Utility menu 3 48 HARDCOPY button 3 43 3 48 3 98 Hardcopy if Condition Met Acquire menu 3 65 Hardcopy Interface Optional RS 232 Centronic A 1 Hardcopy menu BMP Color 3 48 BMP Mono 3 48 Clear Spool 3 48 3 50 Deskjet 3 48 DPU411 II 3 48 DPU412 3 48 EPS Color Img 3 48 EPS Color Plt 3 48 EPS Mono Img 3 48 EPS Mono Pit 3 48 Epson 3 48 Format 3 48 GPIB 3 48 HPGL 3 48 Interleaf 3 48 Landscape 3 48 Laserjet 3 48 Layout 3 48 OK Confirm Clear Spool 3 50 PCX 3 48 PCX Color 3 48 Port 3 48 Portrait 3 48 RLE Color 3 48 Thinkjet 3 48 TIFF 3 48 Hardcopy Utility menu 3 98 HELP button 3 3 Help system 3 3 HF Rej Main Trigger menu 3 23 Hi Res acquisition mode 3 5 Hi res acquisition mode Glossary 2 Hi Res Acquire menu 3 8 High 3 74 High Ref Measure menu 3 79 High Low Setup Measure menu 3 78 Histogram Measure menu 3 78 Holdoff Main Trigger menu 3 70 3 93 Holdoff trigger 3 24 Glossary 2 Horiz Pos Horizontal menu 3 59 Horiz S
47. a forward search on both waveforms or a forward search on the from waveform and a backwards search on the to waveform The latter choice is useful for isolating a specific pair of edges out of a stream To take the measurement you just specified press Delay To main gt OK Create Measurement side To exit the Measure Delay menu without creating a delay measurement press CLEAR MENU TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Measuring Waveforms Take a Snapshot of Measurements Snapshot executes all of the single waveform measurements available on the selected waveform once and displays the results The measurements are not continuously updated All of the measurements listed in Table 3 5 on page 3 73 except for Delay and Phase are displayed You can display a snapshot see Figure 3 43 on any channel or ref memory but only one snapshot can be displayed at a time Tek Run 100KS 5 Sample Snapshot i Again Snapshot on Sil Period 1 000ms Freq 1 00008kKH2 d Width 500ps Width 500ys Snapshot Display gt __ Erstwd 4 020ms Rise BMS Fall 1 Bus Duty 50 0 Duty 50 0 Over 3 1 4 Over 31 4 High 568mV Low SmvV Max 576m Min 0V Ampl 560mV Pk Pk 576mY Mean 287 2mY cycMean 288 0m RMS 401 2mv CycRMS 401 6m hv Area 1 43352mVs CycArea 288 08yVs Select 7 High Low snapsnot Remove Gatin
48. a reference or math waveform is selected only the selected waveform is magnified and positioned All all waveforms displayed live math and reference can be magnified and positioned horizontally at the same time NOTE Although zoom must be turned on to control which waveforms zoom affects the setting for Lock affects which waveforms the horizontal control positions whether zoom is on or off To select between waveform zoom and dual waveform zoom press ZOOM gt Mode main Then press Dual Zoom side to toggle Dual Zoom OFF or ON NOTE Dual zoom displays a second zoomed view of the selected unzoomed waveform The second zoomed view is offset in time from the first zoomed view Also zoom must be enabled On or Preview to see the dual zoom displays TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Zoom Tek Run 250KS 5 Sample Ch2 zoom 0 1X Vert 5 0XHorz Horizontal i Lock All Only the selected waveform the bottom one changes size MIDICG OIcG ch 2 00 YQ 1 00 M40 0ys chi 2 40 V Mode pees Graticule Reset Upper Ololololololo Figure 3 79 Zoom Mode with Horizontal Lock Set to None To Set Dual Zoom Offset To set the offset in time of the second zoomed waveform from the first press ZOOM gt Mode main gt Dual Zoom Offset side Then turn the general purpose knob to s
49. button at any time to remove any menus and to move the readouts below the graticule Kun 100KS 5 sample Recall Factory Trigger Position Indicator Channel Ground Reference Indicator Ol C C C C 1o0 mM Soous chi 300mv OK ae _ _ _ Confirm o XY aa a Factory Init eca ave Recall File Saved Current EEan uiriities Setup Setup Setu Co CO CO Cp oOo Channel Time Base Trigger Readout Readout Readout Figure 2 5 The Display After Factory Initialization 2 14 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Tutorial Example 1 Displaying a Waveform The digitizing oscilloscope provides front panel knobs for you to adjust a waveform or it can automatically set up its controls to display a waveform Do the following tasks to learn how to adjust a waveform and how to autoset the digitizing oscilloscope Adjusting the Waveform The display shows the probe compensation signal It is a 1 kHz square wave of Display approximately 0 5 V amplitude Do the following steps to adjust the size and placement of the waveform using the front panel knobs Figure 2 6 shows the main VERTICAL and HORIZONTAL sections of the front panel Each has SCALE and POSITION knobs 1 Turn the vertical SCALE knob clockwise Observe the change in the displayed waveform and the channel readout at the bottom of the dis
50. capitals all uppercase etc in the manual as is used on the oscilloscope front panel and menus Front panel names are all upper case letters for example VERTICAL MENU CH 1 and SETUP m Instruction steps are numbered The number is omitted if there is only one step m When steps require that you make a sequence of selections using front panel controls and menu buttons an arrow gt marks each transition between a front panel button and a menu or between menus Also whether a name is a main menu or side menu item is clearly indicated Press VERTICAL MENU gt Coupling main gt DC side gt Bandwidth main gt 100 MHz side Using the convention just described results in instructions that are graphical ly intuitive and simplifies procedures For example the instruction just given replaces these five steps 1 Press the front panel button VERTICAL MENU Press the main menu button Coupling Press the side menu button DC E DOOR Press the main menu button Bandwidth 5 Press the side menu button 100 MHz m Sometimes you may have to make a selection from a pop up menu Press TRIGGER MENU gt Type main gt Edge pop up In this example you repeatedly press the main menu button Type until Edge is highlighted in the pop up menu TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual a Product Description 000000 0
51. cece cece cen ececees vii Preface oare anae iene E Snot EEEE ENTENEN ix Getting Started Product Description scce 0006 c0ccscesvasssceseveteessersseece 1 1 Start Up ce cereneretee era Sno hin eG lo aes hla bs ple ane eee laa eae 1 3 Operating Basics Reference QO VEL VOW ssc sist oral nse 0b ENER vente late wires ENE EIE EEEE ESTEOS 2 1 Ata Glate sercan ronse bales bas oho wid a E E E e bane ee 2 3 Tutorial c g cae siehoiesived E E EAEE EREE 2 11 OVERVIEW 62 it enki och soe tacetawsactes onuGe E E EEES 3 1 Accessing Help i i icccsccivaieewne Suk En AEEKO EEEREN ERER RR 3 3 Acquisition MOdES 6 scesccsrirncossis seor sein eine ets amis iasan 3 5 Delayed Triggering esesesesoesosososossoeseseseseoeso 3 11 Determining Status sesesesscsososocoosoeseseceseoeoo 3 15 Display M des sie 6 e 5c5 c2i0 02s hls meran nenn E AN EEE EKRE 3 17 Edge Trig Geri sesers odie see oie eS bre area ob a E a D 3 21 Fast Fourier Transforms Optional cece cece eens 3 27 File Sy Steam 5ie 6 0 504 ses 3605 guatece nlis ena wtane E E E EEEE ote 3 43 Hard COpy seadrostpo riein aene A EREEREER EREE EPERERA 3 47 Horizontal Control sisi 6 56 05 0038 bese eis be abd be mia aaa 3 55 Limit Testin ne eae 3 63 Logic Triggering TDS 510A Only cee cece cece eens 3 67 Measuring Waveforms ccccccc ccs cccceccccssesceees 3 73 Probe Cal TDS 510A Only cc cece eee cee cee cece cence 3 83 Probe Compensation
52. depends on the length of the waveform record defined above FFT Frequency Domain Record the FFT math waveform after digital signal processing converts the FFT time domain record into a frequency domain record TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 33 Fast Fourier Transforms Offset Position and Scale 3 34 Figure 3 19 compares the waveform record to the FFT time domain record FFT Time Domain Record Waveform Record Waveform Record lt 10K Zero Phase Reference FFT Time Domain Record 10k Waveform Record gt 10 K Zero Phase Reference Figure 3 19 Waveform Record vs FFT Time Domain Record FFTs Transform Time Records to Frequency Records The FFT time domain record is input for the FFT The resulting record is one half the length of the FFT input see Figure 3 20 because the FFT computes both positive and negative frequencies Since the negative values mirror the positive values only the positive values are displayed FFT Time Domain Record FFT Frequency Domain Record Figure 3 20 FFT Time Domain Record vs FFT Frequency Domain Record The following topics contain information to help you display your FFT properly TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Fast Fourier Transforms Adjust for a Non Clipped Display To properly display your FFT waveform scale the source waveform so it is not clipped m Scale and position the source waveform so it
53. done Zero on the X scale is the trigger point with negative values being pretrigger and positive values being posttrigger Tek Run 100MS s Sample Save Format Internal Spreadsheet Mathcad 200mv y M 500ns chi 28my enn eee ee wen S Recall Wim Save Wim Delete File pormat iliti to Ref ch Refs ETNO utilities LOO Figure 3 58 Save Format Menu 3 108 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Saving and Recalling Waveforms To View a Waveform on a Spreadsheet TDS 400A Only To save a waveform and view the waveform data using a spreadsheet this example uses EXCEL 1 With a disk in the disk drive press save recall WAVEFORM gt Save Format main gt Spreadsheet side Press Save Wfm main gt To File side Then press Save to Selected File side Remove the disk and place it in your computer drive Start EXCEL Using the EXCEL File menu select Open From the List Files of Type menu select Text Files prn txt csv From the Drives menu select the drive containing the waveform file From the File Name menu select the name of the waveform file Now select OK TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 109 Saving and Recalling Waveforms 3 110 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual i 4 Selecting Channels The digitizing
54. is contained on screen Off screen waveforms may be clipped resulting in errors in the FFT waveform If you use off screen waveforms turn on Pk Pk in the measurement menu and monitor the source waveform for clipping m Use vertical position and vertical offset to position your source waveform As long as the source waveform is not clipped its vertical position and vertical offset will not affect your FFT waveform except at DC DC correction is discussed below Adjust Offset and Position to Zero for DC Correction Normally the output of a standard FFT computation yields a DC value that is twice as large as it should be with respect to the other frequencies Also the selection of window type introduces errors in the DC value of an FFT The displayed output of the FFT on TDS oscilloscopes is corrected for these errors to show the true value for the DC component of the input signal The Position and Offset must be set to zero for the source waveform in the Vertical menu When measuring the amplitude at DC remember that 1 VDC equals 1 Vrms and the display is in dB Record Length Most often you will want to use a short record length because more of the FFT waveform can be seen on screen and long record lengths can slow oscilloscope response However long record lengths lower the noise relative to the signal and increase the frequency resolution for the FFT More important they might be needed to capture the waveform feature you want to inc
55. main gt Ch1 Ch2 Ch3 or Ch4 side To change the holdoff time and select the trigger mode Press TRIGGER MENU gt Type main gt Pulse pop up gt Mode and Holdoff main gt Auto or Normal side See To Set Mode and Holdoff on page 3 24 for more information When you select the pulse class Glitch the oscilloscope will trigger on a pulse narrower or wider in width than some specified time To define the glitch in terms of polarity positive negative or either and width 1 Press TRIGGER MENU gt Type main gt Pulse pop up gt Polarity and Width main gt Positive Negative or Either side m Glitch Positive looks at positive going pulses m Glitch Negative looks at negative going pulses m Glitch Either looks at both positive and negative pulses 2 Press Width side and set the glitch width using the general purpose knob or keypad To specify whether to trigger on glitches or filter out glitches using the Glitch main menu item press TRIGGER MENU gt Type main gt Pulse pop up gt Class main gt Glitch pop up gt Glitch main gt Accept Glitch or Reject Glitch side If you choose Accept Glitch the oscilloscope will trigger only on pulses narrower than the width you specified If you select Reject Glitch it will trigger only on pulses wider than the specified width To set the trigger level with the Level main menu or the front panel trigger LEVEL knob press TRIGGER MENU gt T
56. numbered channel For example CH 2 is higher than CH 1 3 66 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual SSS a Logic Triggering TDS 510A Only There are two classes of logic triggering pattern and state A pattern trigger occurs when the logic inputs to the logic function you select cause the function to become TRUE or at your option FALSE When you use a pattern trigger you define m The precondition for each logic input logic high low or do not care m The Boolean logic function select from AND NAND OR and NOR m The condition for triggering whether the trigger occurs when the Boolean function becomes TRUE logic high or FALSE logic low and whether the TRUE condition is time qualified see page 3 71 A State trigger occurs when the logic inputs to the logic function cause the function to be TRUE or at your option FALSE at the time the clock input changes state When you use a state trigger you define m The precondition for each logic input channels 1 2 and 3 m The direction of the state change for the clock input channel 4 m The Boolean logic function select from clocked AND NAND OR and NOR m The condition for triggering whether the trigger occurs when the Boolean function becomes TRUE logic high or FALSE logic low Table 3 4 on page 3 68 lists the preconditions required for each logic function to issue a pattern or state logic trigger Logic Trigger Readouts
57. of a waveform do the following steps 1 Press the channel selection button of the channel you wish to measure Note the vertical scale factor for the channel in the channel readout on screen 2 Count the graticule divisions between to two features to be measured and multiply by the vertical scale factor For example if you count five major vertical graticule divisions between the minimum and maximum values of a waveform at a scale factor of 100 mV di vision then you can easily calculate your peak to peak voltage as 5 divisions x 100 mV division 500 mV NOTE When you select the NTSC graticule the volts per division of all selected channels is set to 143 mV div 152 mV div for PAL where the divisions are those of the conventional graticule not the divisions of the video graticules For NTSC the actual grid lines represent 10 IRE and for PAL the lines are 100 mV apart Measure Waveform Time To measure the time of a waveform repeat the process just described but count the horizontal divisions and multiply by the horizontal scale factor For example if you count five major horizontal graticule divisions for one waveform cycle at a horizontal scale factor of 50 us division then you can easily calculate the waveform period as 5 divisions Xx 50 us division 250 us or 400 kHz TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual ee Probe Cal TDS 510A Only To optimize the oscilloscope capability to make ac
58. over the rectangular window Hanning Very good for measuring amplitude accuracy but degraded for resolving frequencies Blackman Harris Best window for measuring the amplitude of frequencies but worst at resolving frequencies See Selecting a Window on page 3 39 provides in depth information on choosing the right window for your application If you did not select Phase deg or Phase rad in step 7 skip to step 12 Phase suppression is only used to reduce noise in phase FFTs If you need to reduce the effect of noise in your phase FFT press Suppress phase at amplitudes lt side Use the general purpose knob or the keypad to adjust the phase suppression level FFT magnitudes below this level will have their phase set to zero See Adjust Phase Suppression on page 3 38 provides additional informa tion on phase suppression Press OK Create Math Wfm side to display the FFT of the waveform you input in step 1 see Figure 3 17 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Fast Fourier Transforms kunning 50 0MS s sample IM D D C a i oo va oops Chi FO S134 Mathi 20 0dB 2 50MHz LOLO C C C Olo Figure 3 17 FFT Math Waveform in Math1 Cursor Measurements of Once you have displayed an FFT math waveform use cursors to measure its an FFT frequency amplitude or phase angle 1 Be sure MORE is
59. polarity Press the TRIGGER MENU gt Sync Polarity main gt Neg Sync or Pos Syne side To specify the TV Delay Mode see Figure 3 70 Press the TRIGGER MENU gt TV Delay Mode main gt Delay by Lines or Delay by Time side Use the general purpose knob to enter the value TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Video Triggering Tek Run aa Sample Delay Mode nc ass polarity Mode bean tlds iosi TYPE Cc lt Video gt lt TS gt Negative Lines O Ololololololo Figure 3 70 Video Trigger Menu TV Delay Mode To Select TV Fields To select the NTSC PAL or SECAM field to trigger on Press the TRIGGER MENU gt Scan main gt Odd Even or All side see Figure 3 71 If you choose Odd the digitizing oscilloscope always triggers on the start of the odd field in an interlaced frame If you choose Even the digitizing oscilloscope always triggers on the first line of the even field in an interlaced frame If you choose All the digitizing oscilloscope alternates between triggering on the start of the odd and even fields To Set the Scan Rate amp If you select Custom in the Class menu the Scan Rate amp Interlace option lists Interlace Mode several frequency range options see Figure 3 72 Precise setting of the Scan Period is only required if the video class is Custom and you use video
60. press the side menu Save To Selected File to complete the operation NOTE Setups are not transferable between different oscilloscope models or software versions To recall a setup stored internally press SETUP gt Recall Saved Set up main gt Recall Setup 1 Recall Setup 2 side To recall a setup stored on disk press From File Then use the general purpose knob to select the exact file from the resulting scrollbar list Finally press Recall From Selected File to complete the operation Recalling a setup does not change the menu that is currently displayed If you recall a setup that is labeled factory in the side menu you recall the factory setup The conventional method for recalling the factory setup is described below TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 103 Saving and Recalling Setups Tek Run 100KS 5 Sample Save Current Setup To File To Setup factory To Setup 2 factory To Setups factory 20 0m M 500s Chi 27 2mv ete z s 4 o tcg r feil i 4 ima iy Ey gig phy r File Current oe Setu Setup Utilities DI CIOI O O LmlLOlo lOolo oloa Figure 3 55 Save Recall Setup Menu To Recall the Factory Setup To reset your oscilloscope to the factory defaults Press SETUP gt Recall Factory Setup main gt OK Confirm Factory Init side To Delete
61. side repeatedly to cycle it to inv invert intg or diff Waveform integration intg and waveform differentiation diff are part of Option 2F 4 Tocreate the math waveform press OK Create Math Wfm side To Use Dual Wim Math To create a math waveform that requires two waveform sources do the following steps NOTE If you select the 120K record length in the Horizontal menu of a TDS 400A then you can only save one reference waveform Also you can only use display four waveforms Even if you do not display the source waveforms Dual waveform math uses three of the four waveforms For example if you display a math waveform that is the sum of CH I and CH 2 even if CH 1 and CH 2 are not displayed you have used three waveforms Therefore you can only display one additional waveform 1 Press MORE gt Math1 Math2 or Math3 main gt Change Math waveform definition side gt Dual Wfm Math main see Figure 3 78 2 To define the first source waveform press Set 1st Source to side repeated ly to cycle it to the desired channel or reference waveform 3 To define the second source waveform press Set 2nd Source to side repeatedly to cycle it to the desired channel or reference waveform 4 Toenter the math operator press Set operator to side repeatedly to cycle it through the choices Supported operators are and on the TDS 510A 5 Press OK Create Math Wfm side to perform the function NOT
62. template 1 Press SHIFT ACQUIRE MENU gt Limit Test Sources main gt Compare Ch1 to Compare Ch2 to Compare Ch3 to or Compare Ch4 to side On the TDS 510A you may also select Compare Math1 to Compare Math2 to or Compare Math3 to side 2 Once you select one of the channels as a waveform source from the side menu press the same side menu button to toggle to the reference memory in which you stored the template Choosing None turns limit testing off for the specified channel To Specify the Limit Test To specify the action to take if waveform data exceeds the limits set by the limit Response test template 1 Press SHIFT ACQUIRE MENU gt Limit Test Setup main to bring up a side menu of possible actions 2 Ensure that the side button corresponding to the desired action reads ON m To send a hardcopy command when waveform data exceeds the limits set toggle Hardcopy if Condition Met side to ON Do not forget to set up the hardcopy system See Hardcopy on page 3 47 for details m To ring the bell when waveform data exceeds the limits set toggle Ring Bell if Condition Met side to ON To stop the digitizing oscilloscope when waveform data exceeds the limits set toggle Stop After Limit Test Condition Met side to ON NOTE The button labeled Stop After Limit Test Condition Met corresponds to the Limit Test Condition Met menu item in the Stop After main menu You can turn this button on in the Limit Test Set
63. that the indicator next to CH 1 is on Note the highlighted menu item in the side menu also changes from the 50 Q channel 2 setting to the 1 MQ impedance setting of channel 1 2 Press CH 2 gt Q side to toggle the selection to 1 MQ This returns the coupling impedance of channel 2 to its initial state 2 20 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Tutorial Tek Run 100kS s Sa Impedance 50 Side Menu Title 200mv ch2 100mV M 500ps Chis 268mV Offset V ch Coupling Impedance f rE EA kandawiatn FIN Scale position full Sean 0 div a LO ae D CO Figure 2 13 The Menus After Changing Channels Remove a Waveform Pressing the WAVEFORM OFF button removes the waveform for the currently selected channel If the waveform you want to remove is not already selected select that channel using the channel CH button To remove a waveform from the display do the following steps 1 Press WAVEFORM OFF under the vertical SCALE knob Since the CH 2 light was on when you pressed the WAVEFORM OFF button the channel 2 waveform was removed The channel CH lights now indicate channel 1 Channel 1 has become the selected channel When you remove the last waveform all the CH lights are turned off 2 Press WAVEFORM OFF again to remove the channel waveform TDS 420A TDS 430A TDS 460A amp T
64. the selected waveform Depending upon the record length FFT math waveforms may be zoomed or not Sin x x interpolation may distort the magnitude and phase displays of the FFT depending on which window was used You can easily check the effects of the interpolation by switching between sin x x and linear interpolation and observing the difference in measurement results on the display If significant differences occur use linear interpolation Aliasing occurs when the oscilloscope acquires a source waveform with frequency components outside of the frequency range for the current sample rate In the FFT waveform the actual higher frequency components are under sampled and therefore they appear as lower frequency aliases that fold back around the Nyquist point see Figure 3 21 The greatest frequency that can be input into any sampler without aliasing is 1 2 the sample frequency Since source waveforms often have a fundamental frequency that does not alias but have harmonic frequencies that do use the following methods to recognize and deal with aliases m A source waveform with fast edge transition times creates many high frequency harmonics m Sample the source signal at rates that are at least 2X that of the highest frequency component having significant amplitude m Filter the input to bandwidth limit it to frequencies below that of the Nyquist frequency m Recognize and ignore the aliased frequencies If you think yo
65. trigger That is you specify a time that Pattern Trigger the boolean logic function AND NAND OR or NOR must be TRUE logic high You also choose the type of time qualification greater or less than the time limit specified as well as the time limit using the Trigger When menu selection 1 Press TRIGGER MENU gt Type main gt Logic pop up gt Class main gt Pattern pop up gt Trigger When main gt True for less than or True for more than side 2 Use the general purpose knob or keypad to set the time in the side menu When you select True for less than and specify a time using the general purpose knob the input conditions you specify must drive the logic function high TRUE for less than the time you specify Conversely True for more than requires the boolean function to be TRUE for longer than the time you specify Note the position of the trigger indicator in Figure 3 37 Triggering occurs at the point the logic function you specify is determined to be true within the time you specify The digitizing oscilloscope determines the trigger point in the following manner m It waits for the logic condition to become true m It starts timing and waits for the logic function to become false m It compares the times and if the time TRUE is longer for True for more than or shorter for True for less than then it triggers a waveform display at the point the logic condition became false This time can be and usually
66. vertical units per second rather than in volt seconds as is indicated for the integral waveform measured in the procedure Usage Considerations When creating differentiated math waveforms from live channel waveforms consider the following topics Offset Position and Scale Note the following tips for obtaining a good display m Scale and position the source waveform so it is contained on screen Off screen waveforms may be clipped resulting in errors in the derivative waveform m Use vertical position and vertical offset to position your source waveform The vertical position and vertical offset will not affect your derivative waveform unless you position the source waveform off screen so it is clipped TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 133 Waveform Differentiation 3 134 Zoom m When using the vertical scale knob to scale the source waveform note that it also scales your derivative waveform The derivative math waveform may be too large vertically to fit on screen even if the source waveform is only a few divisions on screen You can use Zoom to reduce the size of the waveform on screen see Zoom that follows but if your waveform is clipped before zooming it will still be clipped after it is zoomed If your math waveform is a narrow differentiated pulse it may not appear to be clipped when viewed on screen You can detect if your derivative math wave form is clipped by expanding it h
67. volts rather than in volts per second as is indicated for the differential waveform measured in the procedure Usage Considerations When creating integrated math waveforms from live channel waveforms consider the following topics Offset Position and Scale Note the following requirements for obtaining a good display m Scale and position the source waveform so it is contained on screen Off screen waveforms may be clipped resulting in errors in the integral waveform m You can use vertical position and vertical offset to position your source waveform The vertical position and vertical offset will not affect your integral waveform unless you position the source waveform off screen so it is clipped m When using the vertical scale knob to scale the source waveform note that it also scales your integral waveform DC Offset The oscilloscope integrates any DC offset along with the time varying portions of your waveform Even a few divisions of offset may be enough to ensure that the integral waveform saturates clips especially with long record lengths You may be able to avoid saturating your integral waveform if you choose a shorter record length Reducing the sample rate with the source channel selected might also prevent clipping You can also select AC coupling in the vertical menu of the source waveform or otherwise DC filter it before applying it to the oscilloscope input Zoom Once you have your waveform optimally displ
68. while they are connected to a voltage source Ground the Product This product is grounded through the grounding conductor of the power cord To avoid electric shock the grounding conductor must be connected to earth ground Before making connections to the input or output terminals of the product ensure that the product is properly grounded Do Not Operate Without Covers To avoid electric shock or fire hazard do not operate this product with covers or panels removed Use Proper Fuse To avoid fire hazard use only the fuse type and rating specified for this product Do Not Operate in Wet Damp Conditions To avoid electric shock do not operate this product in wet or damp conditions Do Not Operate in an Explosive Atmosphere To avoid injury or fire hazard do not operate this product in an explosive atmosphere Product Damage Use Proper Power Source Do not operate this product from a power source that Precautions applies more than the voltage specified Provide Proper Ventilation To prevent product overheating provide proper ventilation Do Not Operate With Suspected Failures If you suspect there is damage to this product have it inspected by qualified service personnel TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual vii General Safety Summary viii Symbols and Terms A ZN Certifications and Compliances Terms in this Manual These terms may appear in this manual WARNING Warning statements id
69. 2mV eee see Delayed Trig Menu es fas es es w zoomv 2o ma a a Time nase I D B 520 Clock internal Horiz Controls Horiz Pos Time Base Readout O Ololololololo Figure 3 30 Record View and Time Base Readouts TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 55 Horizontal Control To Change Horizontal Scale and Position 3 56 The Digitizing Oscilloscope provides control of horizontal position and scale using either the horizontal front panel knobs or the horizontal menu This section describes how to use both the knobs and the menu to adjust your waveforms By changing the horizontal scale you can focus on a particular portion of a waveform By adjusting the horizontal position you can move the waveform right or left to see different portions of the waveform NOTE If external clock TDS 400A only is enabled and zoom is disabled the horizontal scale is set to 50 c indicating 50 clocks per division and the Horizontal SCALE knob has no effect To change the horizontal scale and position 1 Turn the horizontal SCALE and horizontal POSITION knobs see Figure 3 31 2 If you want the POSITION knob to move faster press the SHIFT button When you use the horizontal SCALE knob and select a channel you scale all channel waveforms displayed at the same time If you select a math or reference waveform
70. 3 15 3 16 Display 3 15 Firmware version 3 15 T O 3 15 System 3 15 Trigger 3 15 Waveforms 3 15 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Index Stop After Limit Test Condition Met Acquire menu 3 65 Stop After Acquire menu 3 9 3 65 Style Display menu 3 17 Switch principal power 1 4 2 6 Sync Polarity Video Trigger menu 3 128 System Status menu 3 15 System Utility menu 3 48 3 97 T Talk Listen Address Utility menu 3 97 Tek Secure 3 104 Glossary 3 Tek Secure Erase Memory Utility menu 3 104 Temperature compensation 3 115 Template Source Acquire menu 3 63 Test Data Report A 2 Text Grat Display menu 3 18 Thinkjet 3 47 Thinkjet Hardcopy menu 3 48 Thresholds Main Trigger menu 3 94 TIFF 3 47 TIFF Hardcopy menu 3 48 Time base Glossary 4 Time Base Horizontal menu 3 12 3 59 Tracking Cursor menu 3 120 Trigger 3 113 Glossary 4 Delayed 3 11 3 14 Edge 3 21 Glitch 3 91 Logic 3 67 3 68 Pattern 3 67 3 70 Position 3 57 Pulse 3 91 Readout 3 21 Runt 3 91 3 94 State 3 72 Status Lights 3 21 Video 3 127 Width 3 96 Trigger Bar 2 7 Trigger Bar Style Display menu 3 18 Trigger level 3 21 Trigger Level Bar Readout 3 18 Trigger MAIN LEVEL knob 2 16 3 25 TRIGGER MENU button 3 22 3 69 3 92 3 94 3 127 Trigger Point Readout 3 18 Trigger Position Horizontal menu
71. 36 1 Base 3 120 1 Clocks 3 120 1 seconds Hz 3 120 Amplitude Units 3 121 Base 3 121 Function 3 118 3 120 H Bars 3 118 3 120 Horizontal Units 3 120 Independent 3 120 IRE NTSC 3 121 seconds 3 120 Tracking 3 120 Video Line Number 3 120 Cursor readout H Bars 3 31 3 133 3 136 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Index Paired 3 133 Paired cursors 3 33 3 137 V Bars 3 32 3 133 3 137 Cursor Readouts 3 118 Cursor Speed 3 121 Cursors 3 117 3 122 How to use 3 118 with derivative waveforms 3 33 with FFT waveforms 3 3 Custom Video Trigger menu 3 128 Cycle area 3 73 Cycle mean 3 73 Cycle RMS 3 73 D Date Time On hardcopies 3 49 To set 3 49 DC coupling 3 124 DC offset 3 35 for DC correction of FFTs 3 35 with math waveforms 3 35 3 138 DC Main Trigger menu 3 23 Define Inputs Main Trigger menu 3 70 3 72 Define Logic Main Trigger menu 3 71 3 72 Delay by Events Delayed Trigger menu 3 13 Delay by Lines Video Trigger menu 3 128 Delay by Time Delayed Trigger menu 3 13 Delay by Time Video Trigger menu 3 128 Delay by Delayed Trigger menu 3 13 Delay measurement 3 79 Delay time Glossary 1 Delay To Measure Delay menu 3 79 Delayed Only Horizontal menu 3 12 Delayed Runs After Main Horizontal menu 3 12 3 59 Delayed Scale Horizontal menu 3 58 DELAYED TRIG button 3 12 Delayed trigger 3
72. 41 selecting 3 39 Windowing process 3 39 Windows descriptions of 3 29 X XY Format 3 20 XY format Glossary 4 XY Display menu 3 20 Y YT Format 3 20 YT format Glossary 4 YT Display menu 3 20 Z Zero phase reference point 3 37 establishing for impulse testing 3 37 3 38 Zoom 3 143 3 146 And waveforms 3 143 derivative math waveforms 3 134 Dual Zoom 3 144 Dual Zoom Offset 3 145 Horizontal lock 3 144 3 146 on FFT math waveforms 3 36 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Index on integral math waveforms 3 38 Horizontal Lock 3 144 3 146 Preview 3 145 Preview 3 145 ZOOM button 3 144 3 146 Reset Zoom Factors 3 146 Zoom menu Zoom Off 3 146 Dual Zoom 3 144 Zoom Off Zoom menu 3 146 Dual Zoom Offset 3 145 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Index 13 Index Index 14 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual
73. 460A amp TDS 510A User Manual 3 75 Measuring Waveforms Measurement Units TDS 400A Only When switching from internal to external clocks units of seconds become clocks units of Hertz become clock and units of Vsec become Vclocks Select and Display Measurements To use the automatic measurements you first need to obtain a stable display of the waveform to be measured Pressing AUTOSET may help Once you have a stable display press MEASURE to bring up the Measure menu Figure 3 39 Tek Run 100KS 5 Sample Select Measurement Delay Burst Width 100mY y M 500s chi 108m more 30f7 CI O C O sie qi 5 Remove Gating Reference Measrmnt Setup Snapshot annega vieasrmnt OFF Histogram Levels LO C O C C O m Figure 3 39 Measure Menu Measurements are made on the selected waveform The measurement display tells you the channel the measurement is being made on 1 Press MEASURE gt Select Measrmnt main 2 Select a measurement from the side menu Remove Measurements To remove measurements do the following steps 1 Press MEASURE gt Remove Measrmnt main 3 76 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Measuring Waveforms 2 Select the measurement to remove from the side menu If you want to remove all the measurements at one time press
74. AL MENU gt Coupling main The vertical menu gives you control over many vertical channel parameters Figure 2 12 Although there can be more than one channel displayed the vertical menu and buttons only adjust the selected channel Each menu item in the Vertical menu displays a side menu Right now the Coupling item in the main menu is highlighted which means that the side menu shows the coupling choices 7 Press Q side to toggle the selection to 50 Q this changes the input coupling of channel 2 from 1 MQ to 50 Q The channel readout for channel 2 near the bottom of the graticule now shows an Q indicator TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 2 19 Tutorial Tek Run 100kKS 5 Sample Impedance E 50 Ch2 Coupling Impedance Side Menu Title DICIOC O O ch 200mv 100m M 500ys chi 7 268mv T i i i i x 50 E kandwiatn M2 Scale position offset Full OMV 3 22 div au LO LO O C C O o Figure 2 12 The Vertical Main Menu and Coupling Side Menu Assign Controls to Pressing a channel CH button sets the vertical controls to that channel It also Another Channel adds the channel to the display if that waveform is not already displayed To explore assigning controls to different channels do the following steps 1 Press CH 1 Observe that the side menu title shows Ch1 see Figure 2 13 and
75. Accessories Standard Accessories Table A 2 lists the standard accessories that are included with the digitizing oscilloscope Table A 2 Standard Accessories Accessory Part Number User Manual 070 9701 XX Reference 020 2192 XX Performance Verification TDS 400A 070 9705 XX TDS 510A 070 9706 XX U S Power Cord 161 0230 01 FrontCover TDS 510A 200 3696 00 Probes one P6138 P 6138A 10X Passive TDS 420A P6138A single unit per channel P6138A 10X Passive TDS 430A P6138A 10X Passive TDS 460A P6139A 10X Passive TDS 510A P6139A single unit Optional Accessories You can also order the optional accessories listed in Table A 3 Table A 3 Optional Accessories Accessory Part Number FrontCover TDS 400A 200 3232 00 Current Probe Calibrator TCP 202 High Voltage Differential P robe P5205 High Voltage Differential P robe P5200 Analog Differential Amplifier ADA400A Service Manual TDS 400A 070 9703 XX TDS 510A 070 9704 XX Printed Programmer Manual 070 9876 XX Video Clamp TDS 400A 013 0278 00 P lotter GPIB and Centronics Standard HC100 P lotter Centronics Standard HC200 Oscilloscope Cart TDS 400A K212 TDS 510A K420 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual A 3 Appendix A Options and Accessories Table A 4 Compatible Probes Accessory Probes Table A 3 Optional Accessories Cont Accessory Part Number Rackmount Kit for field conversion TDS 400A 016 1166 00 TDS 510A
76. At the bottom of the display the Trigger readout shows some of the key parameters of the logic trigger see Figure 3 35 NOTE When Logic is the selected trigger type the threshold levels that help determine triggering are set for each channel individually in the Set Thresholds menu Therefore the Trigger Level readout will disappear on the display and the Trigger Level knob can be used to set the threshold level while the Main Trigger menu is set to Logic TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 67 Logic Triggering Definitions 3 68 Ch1 2 3 Inputs High Don tCare High Pulse VIGO Define e Inputs on Class lt State gt Type lt Logic gt Trigger Class State Logic OR N A Edge E o TO M 5004s State HXX Ch 4 Input Rising Edge 0 ode amp Holdoff Olololo olo Figure 3 35 Logic Trigger Readouts Table 3 4 lists the definitions for the four types of logic functions available Keep in mind the following operating modes for the two classes pattern and state of logic triggers as you apply the definitions Table 3 4 Logic Triggers Pattern State AND NAND Clocked AND 34 gt L Clocked NAND Definition 1 2 If all the preconditions selected for the logic inputs3 are true then the oscillo scope triggers If not all of the preconditi
77. C5 Service Assurance Calibration Option XL Options 02 13 1M and 2F TDS 400A Only A 2 With this option Tektronix ships a test data report for the oscilloscope Besides the standard North American 110 V 60 Hz power cord Tektronix ships any of five alternate power cord configurations listed in Table A 1 with the oscilloscope when ordered by the customer Table A 1 International Power Cords Option Power Cord Al Universal European 220 V 50 Hz A2 UK 240 V 50 Hz A3 Australian 240 V 50 Hz A4 North American 240 V 60 Hz A5 Switzerland 220 V 50 Hz With this option Tektronix ships a French language user manual With this option Tektronix ships a German language user manual With this option Tektronix ships a Japanese language user manual With this option Tektronix provides an additional two years of warranty repair support With this option Tektronix provides an additional five years of calibration support With this option Tektronix ships a front cover and pouch RS 232 and a Centronics interface that can be used to obtain hardcopies of the oscilloscope screen a 120 000 Point Record Length and advanced DSP math the oscillo scope can compute and display three advanced math waveforms integral of a waveform differential of a waveform and an FFT Fast Fourier Transform of a waveform TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Appendix A Options and
78. Compensation SPC minimizes electrical offsets in the vertical horizontal and trigger amplifiers caused by changes in ambient temperature and component aging This allows you to make accurate measurements over a wide ambient temperature range Run an SPC anytime you wish to ensure that the measurements you make are made with the most accuracy possible You should also run an SPC if the temperature has changed more than 5 C since the last SPC was performed NOTE When making measurements at volts division settings less than or equal to 5 mV you must run SPC at least once per week Failure to do so may result in the oscilloscope not meeting warranted performance levels at those volts div settings To run an SPC do the following steps 1 Power on the digitizing oscilloscope and allow a 20 minute warm up 2 Disconnect all input signals STOP If you interrupt or lose power to the instrument while signal path compensation is running a message is stored in the oscilloscope error log If such a case occurs rerun signal path compensation The error message remains in the error log until cleared using special service software 3 Press SHIFT UTILITY System main gt Cal pop up gt Signal Path main OK Compensate Signal Paths side D 4 Wait for signal path compensation to complete one to three minutes While it progresses a clock icon shown at left is displayed on screen When compensation completes
79. Control NOTE On a TDS 400A when you set the Horizontal SCALE to 50 ms or slower and the Roll Mode Status is Automatic or if the horizontal Clock menu is set to External and the maximum external sample rate is set to 1 kc per second maximum or less the oscilloscope enters Roll mode You can read about Roll mode beginning on page 3 99 Roll Mode TDS 400A You can turn Roll Mode off or allow roll mode to turn on and off automatically Only see Roll Mode on page 3 99 for more information Horizontal Position To set the horizontal position to specific values in the menu instead of using the Horizontal POSITION knob Press HORIZONTAL MENU gt Horiz Pos main gt Set to 10 Set to 50 or Set to 90 side to choose how much of the waveform is displayed to the left of the display center You can also control whether changing the horizontal position setting affects all displayed waveforms just the live waveforms or only the selected waveform See Zoom on page 3 143 for the steps to set the horizontal lock feature To Select the Delayed To select between the Main and Delayed views of the time base Time Base Press HORIZONTAL MENU gt Time Base main gt Main Only Intensi fied or Delayed Only side NOTE If external clock is enabled selecting Intensified intensifies the entire time base By pressing Intensified you display an intensified zone that shows where the delayed trigger record length could occ
80. DS 460A amp TDS 510A User Manual Tutorial There are several important things to observe on the screen m The knob icon appears at the top of the screen The knob icon indicates that the general purpose knob is set to adjust a parameter m The upper right corner of the screen shows the readout High Ref 90 m The High Ref side menu item is highlighted and a box appears around the 90 readout in the High Ref menu item The box indicates that the general purpose knob is currently set to adjust that parameter To adjust the high level to 80 turn the general purpose knob Display aSnapshot of You can pop up a display of almost all of the automated measurements To Automated Measurements display a snapshot of automated measurements of the selected channel do the following steps 1 Press Snapshot main to pop up a snapshot of all available single waveform measurements See Figure 2 17 Tek Run 100kKS 5 Sample Snapshot oben Snapshot on wi Period 1 000ms Freq 999 84 HZ i Width 500s width 500ps E Brstwd 4 000ms Rise 8uS Fall BMS Duty 50 0 Duty 50 0 Over 33 2 Over 16 5 High 512mV Low 16mV Max 528mV Min 16mV Ampl 496m Pk Pk 544mvV Mean 262 8m CycMean 262 4m RMS 361 6mv CycRMS 360 4mv nv i Area 21 31156m s CycArea 262 40nVs Select i ewe Remove Gating Reference Measrmnt Setup Snapshot forch easrmnt OFF Histagram Levels snapshot
81. DS 510A User Manual 2 21 Tutorial Example 3 Taking Automated Measurements 2 22 Display Measurements Automatically The digitizing oscilloscope can measure many waveform parameters automati cally and read out the results on screen Do the following tasks to discover how to set up the oscilloscope to measure waveforms automatically To take automated measurements do the following steps 1 If you are not continuing from the previous example follow the instructions on page 2 11 under the heading Setting Up for the Examples Press SETUP gt Recall Factory Setup main gt OK Confirm Factory Init side Press AUTOSET Press MEASURE to display the Measure main menu see Figure 2 14 N Tek Run 100KS 5 Sample Select Measurement a Rise Time Fall Time AI Positive J Duty Cycle LE Negative Duty Cycle 200mv M 5004s Chi F 276mv aE DICIO O O sie qe pap Remove Gating Reference Measrmnt Setup Snapshot afer vieasrmnt OFF Histogram Levels Ololololololoj Figure 2 14 Measure Main Menu and Select Measurement Side Menu 5 If it is not already selected press Select Measrmnt main The readout for that menu item indicates which channel the measurement will be taken from All automated measurements are made on the selected channel TDS 420A TDS 430A TDS 460A
82. E If you select for multiply in step 4 the cursor feature measures amplitude in the units volts squared VV rather than in volts V 3 140 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Waveform Math Tek Run 1 00MS s Ist Source Chi Change Math Definition o Set ist Source to Set operator to Set 2nd g 7 Source to Select the type of Math function to define from Ch2 the bottom row of bezel buttons Define the new function using the side buttons When you are satisfied with the selections press Create Math wfm Press CLEAR MENY to return to the More menu without creating a Math waveform ingle Wimfb RETR Math Math O Ololololololo OK Create Math wfm Oloo Figure 3 78 Dual Waveform Math Menus To Select a Math Waveform To select a waveform that you want to display press MORE gt Math1 Math2 or Math3 main Single and dual waveform math operations are described separately in the previous topics NOTE If your digitizing oscilloscope is equipped with Option 2F Advanced DSP Math the menu item FFT will be at the same brightness as the menu items Single Wfm Math and Dual Wfm Math otherwise FFT will be dimmed TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 141 Waveform Math 3 142 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Zoom Th
83. EVEL MAIN LEVEL Knob DELAYED TRIG TRIGGER MENU SET LEVEL TO 50 Figure 2 7 TRIGGER Controls APPLICATION MENU gt ACQUIRE MENU MEASURE HARDCOPY RUN STOP 7 2 2 UTILITY CURSOR DISPLAY SAVE RECALL WAVEFORM AUTOSE Button D STATUS Figure 2 8 AUTOSET Button Location Figure 2 9 shows the display after pressing AUTOSET If necessary you can adjust the waveform using the knobs discussed earlier in this example 2 16 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Tutorial Tek Run 100kKS 5 Sample Recall Factory 200mv M 500s Chir 280m OK k Confirm Factory Init P ee igi Saved Current Factory Utilities Setup Setup Setu LO COLO C O o Figure 2 9 The Display After Pressing Autoset NOTE If the corners on your displayed signal look rounded or pointed see Figure 2 10 then you may need to compensate your probe See pages 3 83 and 3 89 for probe calibration and compensation procedures JUL SUL Figure 2 10 Display Signals Requiring Probe Compensation TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 2 17 Tutorial Example 2 Displaying Multiple Waveforms 2 18 Adding a Waveform In this example you learn how to display and control more than one waveform at a time The VERTICAL section of the front panel contain
84. Examine the Display Read the following information to become familiar with the oscilloscope display Elements Figure 2 5 shows the display that results from the oscilloscope reset There are several important points to observe m The trigger level bar shows that the waveform is triggered at a level near 50 of its amplitude from step 4 m The trigger position indicator shows that the trigger position of the waveform is located at the horizontal center of the graticule m The channel reference indicator shows the vertical position of channel 1 with no input signal This indicator points to the ground level for the channel when its vertical offset is set to 0 V in the vertical menu when vertical offset is not set to O V the indicator points to the vertical offset level m The trigger readout shows that the digitizing oscilloscope is triggering on channel 1 Ch1 on a rising edge and that the trigger level is about 200 300 mV m The time base readout shows that the main time base is set to a horizontal scale of 500 us div TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 2 13 Tutorial m The channel readout indicates that channel 1 Ch1 is displayed with DC coupling In AC coupling appears after the volts div readout The digitizing oscilloscope always displays channel 1 at reset Right now the channel time base and trigger readouts appear in the graticule area because a menu is displayed You can press the CLEAR MENU
85. LE Color Hardcopy menu 3 48 RMS 3 75 Roll Glossary 3 Roll Mode 3 99 Triggered 3 99 Triggered with Single Sequence 3 99 Untriggered 3 99 Untriggered with Single Sequence 3 99 Using 3 99 RS 232 Port optional 3 97 RUN STOP Acquire menu 3 9 Runt trigger 3 91 3 94 Runt Main Trigger menu 3 94 S Sample acquisition mode 3 5 Sample interval Glossary 3 Sample Acquire menu 3 8 Sampling Glossary 3 Save Setups 3 103 Save Current Setup Save Recall Setup menu 3 103 Save Format Save Recall Waveform menu 3 107 Save Waveform Save Recall Waveform menu 3 105 Save Recall SETUP button 3 43 3 103 Save recall SETUP button 2 12 Save Recall Setup menu 3 103 factory status 3 103 Recall Factory Setup 3 104 3 113 Recall Saved Setup 3 103 Save Current Setup 3 103 user status 3 103 Save Recall WAVEFORM button 3 43 3 105 Save Recall Waveform menu 3 105 active status 3 105 Delete Refs 3 106 empty status 3 105 Ref1 Ref2 Ref3 Ref4 3 106 Save Format 3 107 Save Waveform 3 105 Saving and recalling setups 3 103 Saving and recalling waveforms 3 105 Scale vertical 3 34 3 133 3 138 Scan Parameter Video Trigger menu 3 129 SECAM Video Standard 3 128 SECAM Video Trigger menu 3 128 seconds Cursor menu 3 120 SELECT button 3 120 Select Measrmnt Measure menu 3 76 3 79 Selected waveform 3 111 Selecting channels 3 111 Self test 1 5 Index 10 Serv
86. Measurement 3 75 Record view 2 7 Snapshot 3 81 Time base 2 7 Trigger 2 7 Trigger Level Bar 3 18 Trigger Point 3 18 Readout Cursor Paired 3 33 Readout cursor H Bars 3 31 3 133 3 136 Paired cursors 3 33 3 137 V Bars 3 32 3 133 3 137 Readout Display menu 3 18 Real time sampling Glossary 3 Rear panel 2 6 3 97 Recall Setups 3 103 Recall Factory Setup Save Recall Setup menu 3 104 3 113 Recall Saved Setup Save Recall Setup menu 3 103 Recalling Waveforms 3 105 Record length 1 1 3 57 A 1 Glossary 3 Record Length Horizontal menu 3 57 Record View 3 22 3 55 Record view 2 7 Rectangular window 3 30 Ref1 Ref2 Ref3 Ref4 Reference waveform status 3 106 Ref1 Ref2 Ref3 Ref4 Save Recall Waveform menu 3 106 Reference Indicator Channel 3 111 Reference levels 2 24 3 78 Reference Levels Measure menu 3 78 Reference memory Glossary 3 Reject Glitch Main Trigger menu 3 93 Remote communication 3 97 Remote operation Procedures for 3 97 Selecting and configuring the port 3 97 Remove Measrmnt Measure menu 3 76 3 81 Rename File Utilities menu 3 44 Repetitive Signal Acquire menu 3 8 Reset Zoom Factors Zoom menu 3 146 Ring Bell if Condition Met Acquire menu 3 65 Rise time 2 23 3 75 Rising edge Delayed Trigger menu 3 14 Rising edge Main Trigger menu 3 24 3 72 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Index 9 Index R
87. S 430A TDS 460A amp TDS 510A User Manual Index 3 Index DPU411 II Hardcopy menu 3 48 DPU412 Hardcopy menu 3 48 Dual Wfm Math More menu 3 140 Dual Zoom Zoom menu 3 144 Dual Zoom Offset Zoom menu 3 145 Duty cycle 2 23 E Edge trigger 3 21 Readout 3 21 3 67 Edge Main Trigger menu 3 22 Edges Measure Delay menu 3 80 Either Main Trigger menu 3 93 3 94 empty Saved waveform status 3 105 Encapsulated Postscript 3 47 Enter Char Labelling menu 3 44 3 45 Envelope acquisition mode 3 7 Glossary 2 Envelope Acquire menu 3 8 EPS Color Img Hardcopy menu 3 48 EPS Color Plt Hardcopy menu 3 48 EPS Mono Img Hardcopy menu 3 48 EPS Mono Pit Hardcopy menu 3 48 Epson 3 47 Epson Hardcopy menu 3 48 Equivalent time sampling random Glossary 2 External Clock Horizontal menu 3 59 3 60 F factory Saved setup status 3 103 Fall time 3 74 Falling edge Delayed Trigger menu 3 14 Falling edge Main Trigger menu 3 24 3 72 Fast Fourier Transforms description 3 27 Fast Fourier Transforms FFTs applications 3 27 FFT frequency domain record 3 33 defined 3 33 length of 3 34 FFT math waveform acquisition mode 3 35 aliasing 3 36 automated measurements of 3 33 DC correction 3 35 displaying phase 3 29 interpolation mode 3 36 magnifying 3 36 phase display setup considerations 3 37 phase suppression 3 30 3 38 procedure for displayi
88. Scale to side See step 7 on page 3 29 for more information 6 Press V Bars side Use the general purpose knob to align one of the two vertical cursors to a point of interest along the horizontal axis of the waveform 7 Press SELECT to select the alternate cursor 8 Align the selected cursor to another point of interest on the math waveform 9 Read the frequency difference between the cursors from the A readout Read the frequency of the selected cursor relative to the zero frequency point from the readout The cursor units will always be in Hz regardless of the setting in the Time Units side menu The first point of the FFT record is the zero frequency point for the readout Running 50 0MS s Average MIDIDG DOIca U aT 00s Chit A 1 34 Mathi 10 0 dB 2 50MHz Ololololololo Figure 3 18 Cursor Measurement of an FFT Waveform 3 32 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Fast Fourier Transforms Automated Measurements of an FFT 10 Press Function main gt Paired side 11 Place the vertical bar of each paired cursor to the points along the horizontal axis you are interested in 12 Read the amplitude between the X of the two paired cursors from the top most A readout Read the amplitude of the short horizontal bar of the selected solid cursor relative to either 1 Vrms 0 dB groun
89. User Manual Tektronix TDS 420A TDS 430A TDS 460A amp TDS 510A Digitizing Oscilloscopes 070 9701 03 www tektronix com Copyright Tektronix Inc All rights reserved Tektronix products are covered by U S and foreign patents issued and pending Information in this publication supercedes that in all previously published material Specifications and price change privileges reserved Tektronix Inc P O Box 500 Beaverton OR 97077 TEKTRONIX and TEK are registered trademarks of Tektronix Inc WARRANTY Tektronix warrants that the products that it manufactures and sells will be free from defects in materials and workmanship for a period of three 3 years from the date of shipment If a product proves defective during this warranty period Tektronix at its option either will repair the defective product without charge for parts and labor or will provide a replacement in exchange for the defective product In order to obtain service under this warranty Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service Customer shall be responsible for packaging and shipping the defective product to the service center designated by Tektronix with shipping charges prepaid Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located Customer s
90. V 3AG 159 0046 00 200 2264 00 Below B080000 4 A T 250 V 159 0255 00 200 2265 00 B080000 Up 6 3 A FAST 250 V 159 0381 00 200 2265 00 TDS 510A 25 inch y 1 25 inch UL 198 6 3AG 6 A FAST 250 V 159 0013 00 200 2264 00 5 mm y 20 mm IEC 127 5 A T 250 V 159 0210 00 200 2265 00 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Start Up Front Cover Removal Remove the front cover by grasping its left and right edges and snapping it off of the front subpanel When reinstalling align and snap back on Power On 1 Check that the rear panel principal power switch is on see Figure 1 1 for the location of the switch The principal power switch controls all AC power to the instrument NOTE TDS400A instruments with serial number BO80000 or above do not have a principal power switch 2 If the oscilloscope is not powered on the screen is blank push the front panel ON STBY button to toggle it on Figure 1 2 Once the digitizing oscilloscope is installed you can leave the principal power switch on TDS400A instruments below B080000 and all TDS510A instruments and use the ON STBY button ON STBY Button L TES Figure 1 2 ON STBY Button Self Test The digitizing oscilloscope automatically performs power on tests each time it is turned on It comes up with a display screen that states whether or not it passed s
91. a positive or negative going pulse that crosses one threshold but fails to cross a second threshold before recrossing the first _ Width positive Triggering occurs on a positive pulse with a width between or optionally outside the user specified lower and upper time limits Triggering occurs on a negative pulse with a width between or optionally outside the user specified lower and upper time limits Width negative Operations Common to Glitch Runt and Width The pulse trigger menus let you define the pulse source select the mode auto or normal and adjust the holdoff To bring up the Pulse Trigger menu Press TRIGGER MENU gt Type main gt Pulse pop up gt Class main gt Glitch Runt or Width pop up see Figure 3 49 Run 100KS 5 Pulse Glitch Source 2 eiten M 500ps Glitch Chi 3 7 i width a ere Polanty citeh Level ode lt Pulse gt lt clitch gt MARSA width 4eeePpe 252mV Hoidoff OClCIC C C elelelelelieo Figure 3 49 Main Trigger Menu Glitch Class 3 92 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Pulse Triggering Source Mode amp Holdoff Glitch Operations Polarity amp Width File Glitch Accept or Reject Level To specify which channel becomes the pulse trigger source Press TRIGGER MENU gt Type main gt Pulse pop up gt Source
92. al is coupled to the delayed trigger press Coupling main gt DC AC HF Rej LF Rej or Noise Rej side For descriptions of these coupling types see To Specify Coupling on page 3 23 9 To select the slope that the delayed trigger occurs on press Slope main Choose between the rising edge and falling edge slopes When using Delayed Triggerable mode to acquire waveforms two trigger bars are displayed One trigger bar indicates the level set by the main trigger system the other indicates the level set by the delayed trigger system 10 Press Level main gt Level Set to TTL Set to ECL or Set to 50 side For a description of these level settings see To Set Level on page 3 24 3 14 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual a Determining Status To Display the Status Firmware Date The Status menu lets you see information about the oscilloscope state To display the Status menu see Figure 3 7 Press SHIFT STATUS gt Status main gt System Trigger Waveforms or I O side System displays information about the firmware Horizontal Zoom Acquisition Limit Test Measure and Hardcopy TDS 510A systems Display displays information about the display system Trigger displays information about the triggers Waveforms displays information about the various waveforms including live math and reference I O displays information about the I O port s Tek Run
93. also display the phase shifts of those frequencies Use FFT math waveforms in the following applications m Testing impulse response of filters and systems m Measuring harmonic content and distortion in systems m Characterizing the frequency content of DC power supplies m Analyzing vibration m Analyzing harmonics in 50 and 60 cycle lines m Identifying noise sources in digital logic circuits The FFT computes and displays the frequency content of a waveform you acquire as an FFT math waveform The resulting waveform is a display of the magnitude or phase angle of the various frequencies the waveform contains with respect to those frequencies For example Figure 3 15 shows the non trans formed impulse response of a system in channel 2 at the top of the screen The FFT transformed magnitude and phase appear in the two math waveforms below the impulse The horizontal scale for FFT math waveforms is always expressed in frequency per division with the beginning left most point of the waveform representing zero frequency DC TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 27 Fast Fourier Transforms Normal Waveform of an Stopped 820 Acquisitions J Mdth3 Zoom 0 5X Vet 2 0X Horz Impulse Response FFT Waveform of the A T a e aeae Magnitude Response FFT Waveform of the Phase Response Oloo M s00ps Chi 2 52V 4 Feb 1992 Th 250n1
94. ame you defined in step 5 lt Output port gt is the PC output port your hardcopy device is connected to such as LPT1 or LPT2 For example to copy print a file called screen to a printer attached to the pt parallel port type copy screen Iptl B Your hardcopy device should now print a picture of the digitizing oscilloscope screen NOTE If you transmit hardcopy files across a computer network use a binary 8 bit data path TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 53 Hardcopy 3 54 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual O A Horizontal Control You can control the horizontal part of the display the time base using the horizontal menu and knobs This section describes how to use the horizontal controls and menus To Check the Horizontal Status Check the Record View to determine the size and location of the waveform record and the location of the trigger relative to the display See Figure 3 30 Check the Time Base readout to see the time division settings and the time base main or delayed being referred to See Figure 3 30 Since all live waveforms use the same time base the digitizing oscilloscope only displays one value for all the active channels ra Tek Run 100MS75 Record View Time Base j Main Only Intensified a Delayed Only Delayed Runs ot ns After Main Delayed chi 17
95. amp TDS 510A User Manual Tutorial The Select Measurement side menu lists the measurements that can be taken Up to four can be taken and displayed at any one time Pressing the button next to the more menu item displays the other measurement selections 6 Press Frequency side If the Frequency menu item is not visible press more side repeatedly until the Frequency item appears then press Frequency side Observe that the frequency measurement appears within the right side of the graticule area The measurement readout includes the notation Chl meaning that the measurement is taken on the channel 1 waveform To take a measurement on another channel select that channel and then select the measurement 7 Press Positive Width side gt more side gt Rise Time side gt 2 a Positive Duty Cycle side All four measurements are displayed 8 To move the measurement readouts outside the graticule area press CLEAR MENU see Figure 2 15 Tek Run 100kKS 5 Sample Ch1 Freq 999 00 HZ Chi width ees 501s chi Rise Sus Low q resolution chi Duty 50 0 DOll oj M 500Hs Chi 2760MV 18 Dec 1992 08 08 10 Figure 2 15 Four Simultaneous Measurement Readouts TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 2 23 Tutorial Remove Measurement
96. and rating see Figure 1 1 for the fuse location You can use either of two fuses see Table 1 1 for the fuse data 4 Check that you have the proper electrical connections m For TDS 400A serial number below B080000 90 to 132 V for 48 Hz through 62 Hz 100 to 132 V or 180 to 250 V for 48 through 440 Hz and may require up to 240 W m For TDS 400A serial number BO80000 Up 100 to 240 V 410 50 60 Hz nominal or 115 V 10 for 400 Hz and may require up to 240 W m For TDS 510A all serial numbers 90 to 250 V for 45 Hz to 440 Hz and may require up to 300 W 5 Connect the proper power cord from the rear panel power connector see Figure 1 1 for the connector location to the power system TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 1 3 Start Up TDS 400A Below B080000 Power Connector TDS 400A B080000 Up TDS 510A Power Power Fuse Connector Connector 4 JN Principal Power Switch Principal Fuse Power Switch Figure 1 1 Rear Panel Controls Used in Start Up 1 4 Table 1 1 Fuse and Fuse Cap Part Numbers Fuse Part Number Fuse Cap Part Number Oscilloscope TDS 420A Below B080000 TDS 430A and 5 A FAST 250 V 3AG 159 0014 00 200 2264 00 TDS 460A B080000 Up 8 A 250
97. ange the window selection or you will invalidate the results obtained using the cursor TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Fast Fourier Transforms FFT Windows To learn how to optimize your display of FFT data read about how the FFT windows data before computing the FFT math waveform Windowing Process The oscilloscope multiplies the FFT time domain record by one of four FFT windows before it inputs the record to the FFT function Figure 3 22 shows how the time domain record is processed The FFT windowing acts like a bandpass filter between the FFT time domain record and the FFT frequency domain record The shape of the window controls the ability of the FFT to resolve separate the frequencies and to accurately measure the amplitude of those frequencies Selecting a Window You can select your window to provide better frequency resolution at the expense of better amplitude measurement accuracy in your FFT better amplitude accuracy over frequency resolution or to provide a compromise between both You can choose from these four windows Rectangular Hamming Hanning and Blackman Harris In step 8 page 3 29 in Operation the four windows are listed In general choose a window that can just resolve between the frequencies you want to measure That way you will have the best amplitude accuracy and leakage elimination while still separating the frequencies You can often determine the best window empirically
98. ar Cursors DICDIC O O 2oomv TO M 500us Chi T08mV Remove eeii igh Low Reference Chi aay on Setup Levels Snapshot Ololololololo Figure 3 40 Measure Menu Gating To specify how measure determines the High and Low levels of waveforms do the following step Press MEASURE gt High Low Setup main gt Histogram or Min Max side If you select Min Max you may also want to define reference levels Histogram sets the values statistically It selects the most common value either above or below the mid point depending on whether it is defining the high or low reference level Since this statistical approach ignores short term aberrations overshoot ringing and so forth histogram is the best setting for examining pulses Min max uses the highest and lowest values of the waveform record This setting is best for examining waveforms that have no large flat portions at a common value such as sine wave and triangle waves almost any waveform except for pulses To set the reference levels do the following steps 1 Press MEASURE gt Reference Levels main gt Set Levels side to choose whether the References are set in relative to High 100 and Low 0 or set explicitly in the units of the selected waveform typically volts See Figure 3 41 Use the general purpose knob to enter the values is the default selec
99. art of the delayed timebase record The end of the zone corresponds to the end of the delayed record To learn how to set the intensity level see Display Modes on page 3 17 The Main Trigger menu settings must be compatible with Delayed Triggerable To select Delayed Triggerable mode do the following steps 1 Press TRIGGER MENU 2 Press Type main and either Edge or Pulse as fits your application 3 Press HORIZONTAL MENU gt Time Base main gt Delayed Only side gt Delayed Triggerable side NOTE The Delayed Triggerable menu item is not selectable unless incompatible Main Trigger menu settings are eliminated If such is the case the Delayed Triggerable menu item is dimmer than other items in the menu TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Delayed Triggering By pressing Intensified side you can display an intensified zone that shows where the delayed timebase record may occur a valid delay trigger event must be received relative to the main trigger on the main timebase For Delayed Triggerable After mode the start of the intensified zone corresponds to the possible start point of the delayed timebase record The end of the zone continues to the end of main timebase since a delayed time base record may be triggered at any point after the delay time elapses To learn how to define the intensity level of the normal and intensified waveform see Display Modes on page 3 17 Now you need to
100. at came with your GPIB board Type IBIC 3 Type IBFIND DEV1 where DEV1 is the name for the digitizing oscilloscope you defined using the IBCONF EXE program that came with the GPIB board NOTE If you defined another name use it instead of DEV1 Also remember that the device address of the digitizing oscilloscope as set with the IB CONF EXE program should match the address set in the digitizing oscilloscope Utility menu typically use 1 Making hardcopies using some hardcopy formats may generate a time out on your controller If a time out occurs increase the time out setting of your controller software 4 Type IBWRT HARDCOPY START TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Hardcopy NOTE Be sure the digitizing oscilloscope Utility menu is set to Talk Listen and not Hardcopy Talk Only or you will get an error message at this step Setting the digitizing oscilloscope Utility menu was described in To Set Up for Making Hardcopies on page 3 47 5 Type IBRDF lt Filename gt where lt Filename gt is a valid DOS file name you want to call your hardcopy information It should be lt 8 characters long with up to a 3 character extension For example you could type ibrdf screen1 6 Exit the IBIC program by typing EXIT 7 Copy the data from your file to your hardcopy device Type COPY lt Filename gt lt Output port gt lt B gt where lt Filename gt is the n
101. ayed you may magnify or reduce it vertically and horizontally to inspect any feature Just be sure the integrated waveform is the selected waveform If you wish to see the zoom factor 2X 5X etc you need to turn Zoom on 3 138 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Waveform Math The digitizing oscilloscope allows you to mathematically manipulate your waveforms For example you might have a waveform clouded by background noise You can obtain a cleaner waveform by subtracting the background noise from your original waveform This section describes the standard waveform math features To Use Single Wfm Math The More menu see Figure 3 77 allows you to display define and manipulate math functions To create a math waveform based on a single source waveform 1 Press MORE gt Math1 Math2 or Math3 main gt Change Math waveform definition side gt Single Wfm Math main 2 To define the source waveform press Set Function to side repeatedly to cycle it to the desired channel or reference waveform Tek Run 1 00MS s Sample ch domv Math2 Math3 Chivche FFICChI inv ch Math Change Math waveform definition Olo Figure 3 77 More Menu TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual D O C G O 3 139 Waveform Math 3 Press Set Function to
102. b As you position the cursors readouts on the display report and update measurement information Cursor Types There are three cursor types horizontal bar vertical bar and paired see Figure 3 62 WV X Horizontal Bar Cursors Vertical Bar Cursors Paired Cursors Figure 3 62 Cursor Types Horizontal bar cursors measure vertical parameters typically volts Vertical bar cursors measure horizontal parameters typically time or frequency Paired cursors measure both vertical and horizontal parameters simultaneously Look at Figure 3 62 Note that each of the two paired cursors has a long vertical bar paired with an X The Xs measure vertical parameters the long vertical bars measure horizontal parameters NOTE When cursors measure certain math waveforms the measurement may not be of time frequency or voltage Cursor measurement of those math waveforms are described in Waveform Math which begins on page 3 139 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 117 Taking Cursor Measurements Cursor Modes There are two cursor modes independent and tracking see Figure 3 63 Independent Mode Tracking Mode lt gt Only Selected Cursor Moves gt press SELECT to change Both Cursors Move in Tandem which cursor is selected press SELECT to suspend cursor tracking Figure 3 63 Cursor Modes 3 118 Cursor Readouts
103. bring up the Delayed Trigger menu so you can define the delayed trigger event 4 OnaTDS 400A press SHIFT DELAYED TRIG gt Delay by main gt Triggerable After Time Events or Ext clks side Figure 3 6 5 On the TDS 510A press SHIFT DELAYED TRIG gt Delay by main gt Triggerable After Time Events or Events Time side 6 Enter the delay time or events using the general purpose knob or the keypad Hint You can go directly to the Delayed Trigger menu see steps 4 and 5 By selecting either Triggerable After Time Events or Events Time the oscilloscope automatically switches to Delayed Triggerable in the Horizontal menu If you wish to leave Delayed Triggerable you still need to display the Horizontal menu The Source menu lets you select which input is the delayed trigger source 7 Press Source main gt Ch1 Ch2 Ch3 Ch4 DC Aux or Auxiliary side TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 13 Delayed Triggering Tek Run 200MS s ET Delay by Time 360ns Delayed Edge Delay Triggerable after Time p EEEN Events External Clock Time DICIO O O il 500mvV M 500ns Chi 260m vents h E t i D 250ns Chis 270mY i Source Coupling Slope Level chi DE F 270mV O Ololololololo Figure 3 6 Delayed Trigger Menu TDS 400A shown 8 To define how the input sign
104. by first using the window with the most frequency resolution rectangular and then proceeding toward that window with the least Blackman Harris until the frequencies merge Use the window just before the window that lets the frequencies merge for best compromise between resolution and amplitude accuracy NOTE If the Hanning window merges the frequencies try the Hamming window before settling on the rectangular window Depending on the distance of the frequencies you are trying to measure from the fundamental the Hamming window sometimes resolves frequencies better than the Hanning TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 39 Fast Fourier Transforms FFT Window ON FFTTimeDomainRecord After Windowing FFT Frequency Domain Record Figure 3 22 Windowing the FFT Time Domain Record Window Characteristics When evaluating a window for use you may want to examine how it modifies the FFT time domain data Figure 3 23 shows each window its bandpass characteristic bandwidth and highest side lobe Consider the following characteristics m The narrower the central lobe for a given window the better it can resolve a frequency The lower the lobes on the side of each central lobe are the better the amplitude accuracy The Hanning and Blackman Harris windows taper the data at the end of the record to zero m Narrow lobes increase frequency resolution because they are more selective Lower side lobe amplitude
105. cale Horizontal menu 3 58 Horizontal 3 113 Bar cursors 3 117 Control 3 55 3 62 Position 3 56 Readouts 3 55 Scale 3 56 SCALE knob 2 15 System 2 15 Horizontal Lock Zoom menu 3 144 3 146 Horizontal menu 3 12 Clock 3 59 Delayed Only 3 12 Delayed Runs After Main 3 12 3 59 Delayed Scale 3 58 Delayed Triggerable 3 12 3 59 External Clock 3 59 3 60 Fit to screen 3 57 Horiz Pos 3 59 Horiz Scale 3 58 Intensified 3 12 3 13 Internal Clock 3 59 Main Scale 3 58 Record Length 3 57 Set to 10 3 59 Set to 50 3 59 Set to 90 3 59 Time Base 3 12 3 59 Trigger Position 3 57 HORIZONTAL MENU button 3 12 Horizontal POSITION knob 3 56 3 144 Horizontal Readouts 3 55 Horizontal SCALE knob 3 56 3 144 Horizontal Units Cursor menu 3 120 HPGL 3 47 HPGL Hardcopy menu 3 48 T O Status menu 3 15 VO Utility menu 3 48 3 97 Icons 1 1 Independent Cursor menu 3 120 Infinite Persistence Display menu 3 18 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Index 5 Index Installation 1 3 Integral math waveform applications 3 135 automated measurements of 3 38 magnifying 3 134 3 138 procedure for displaying 3 135 Integration Waveform 3 35 Intensified Samples Display menu 3 17 Intensified Horizontal menu 3 12 3 13 Intensity 3 18 Intensity Display menu 3 18 Interlaced Field One Video Tri
106. ce cere ceeee D 1 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Table of Contents List of Figures Figure 1 1 Rear Panel Controls Used in Start Up 1 4 Figure 1 2 ON STBY Button 0 cece cece cece renee 1 5 Figure 2 1 Connecting a Probe for the Examples 2 11 Figure 2 2 SETUP Button Location 0 cece eee eeee 2 12 Figure 2 3 The Displayed Setup Menu eeeeeeeee 2 12 Figure 2 4 SET LEVEL TO 50 Button 0000 2 13 Figure 2 5 The Display After Factory Initialization 2 14 Figure 2 6 The VERTICAL and HORIZONTAL Controls 2 15 Figure 2 7 TRIGGER Controls 0 cece eee eee rece eee 2 16 Figure 2 8 AUTOSET Button Location 0 eee eee 2 16 Figure 2 9 The Display After Pressing Autoset 2 17 Figure 2 10 Display Signals Requiring Probe Compensation 2 17 Figure 2 11 The Channel Buttons and Lights 2 18 Figure 2 12 The Vertical Main Menu and Coupling Side Menu 2 20 Figure 2 13 The Menus After Changing Channels 2 21 Figure 2 14 Measure Main Menu and Select Measurement Side MENU 530 i 8be se dss doe code Heo ee ESAS OsES SER EOE TES REE OE 2 22 Figure 2 15 Four Simultaneous Measurement Readouts 2 23 Figure 2 16 General Purpose Knob Indicators 2 24 Figure 2 17 Snapshot of Channel 1 ccccececeeees 2 25
107. curate measurements using particular channel and probe execute Probe Cal on a channel with its probe installed Run a Probe Cal anytime you wish to ensure that the measurements you make are made with the most accuracy possible You should also run a Probe Cal if you have changed to a different probe since the last Probe Cal was performed Probe Cal Versus Probe Type Operation Some types of probes can be gain compensated some can be offset compensated and some can be compensated for both Some probes cannot be compensated If your probe has an attenuation factor of greater than 20X it cannot be compensated The digitizing oscilloscope cannot compensate probes whose gain and or offset errors are too great gt 2 gain and or gt 50 mV offset If these errors are not within specification have your probe checked by service personnel NOTE Probe Cal is not recommended with the P6139A passive probe This probe typically has little gain and offset error and therefore the improvement in performance after a Probe Cal is not worth the time needed to do the Probe Cal Probe Cal makes significant performance improvements when performed with active probes or older passive probes If you are installing an active probe such as the P6243 there are no prerequisites to performing this procedure Start at step 1 If you are compensating for a passive probe with this procedure you must first compensate the low frequency response of the pr
108. d If you want to enter a large number using the general purpose knob press the SHIFT button before turning the knob When the light next to the SHIFT button 3 24 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Edge Triggering is on and the display says Coarse Knobs in the upper right corner the general purpose knob speeds up significantly Holdoff is automatically reset to 0 when you change the main time base time division setting However it is not reset if you change the delayed time base time division that is Intensified or Delayed Only To Force a Trigger To force the oscilloscope to immediately start acquiring a waveform record even without a trigger event press the FORCE TRIG front panel button To Single Trigger To trigger on the next valid trigger event and then stop press SHIFT FORCE TRIG Now press the RUN STOP button each time you want to initiate a single sequence of acquisitions Triggering From the Front The trigger buttons and knob let you quickly adjust the trigger level or force a Panel trigger see Figure 3 14 You use the following trigger controls for all trigger types except were noted To Set the MAIN LEVEL To manually change the trigger level turn the MAIN LEVEL knob It adjusts the trigger level or threshold level no matter what menu if any is displayed To Set to 50 To quickly obtain an edge trigger press SET LEVEL TO 50 The oscilloscope sets the trigger level to the halfway p
109. d 0 volts or zero phase level 0 degrees or 0 radians from the readout Read the frequency between the long horizontal bars of both paired cursors from the bottom A readout You can also use automated measurements to measure FFT math waveforms Use the same procedure as is found under Waveform Differentiation on page 3 132 Considerations for Using FFTs The FFT Frequency Domain Record There are several characteristics of FFTs that affect how they are displayed and should be interpreted Read the following topics to learn how to optimize the oscilloscope setup for good display of your FFT waveforms The following topics discuss the relation of the source waveform to the record length frequency resolution and frequency range of the FFT frequency domain record The FFT frequency domain waveform is the FFT math waveform that you display FFTs May Not Use All of the Waveform Record The FFT math waveform is a display of the magnitude or phase data from the FFT frequency domain record This frequency domain record is derived from the FFT time domain record which is derived from the waveform record All three records are described below Waveform Record the complete waveform record acquired from an input channel The waveform record is not a DSP Math waveform FFT Time Domain Record that part of the waveform record that is input to the FFT This time domain record waveform becomes the FFT math waveform Its record length
110. d and with respect to the display check the record view at the top of the display see Figure 3 12 To see the trigger point and level on the waveform display check the graphic indicators of trigger position and level which you can optionally display Figure 3 12 shows the trigger position indicator and the short style trigger level bar See Set Display Readout Options on page 3 18 for more information CN Tek Run 1 00MS s Sample hg HA i om ops chit F 206m DI CIO O O Ololololololo Figure 3 12 Record View Trigger Position and Trigger Level Bar Readouts To Select Edge Triggering 3 22 Use the Edge Trigger menu to select edge triggering and to perform the procedures for selecting the source coupling slope trigger level mode and holdoff that follow To bring up the Edge Trigger menu press TRIGGER MENU gt Type main gt Edge pop up see Figure 3 13 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Edge Triggering To Selecta Source To select which source you want for the trigger Press TRIGGER MENU gt Type main gt Edge pop up gt Source main gt Ch1 Ch2 Ch3 Ch4 AC Line or Auxiliary side Tek Run 100kKS 5 Sample Edge Slope 2 00 TO M s00ys Chi ov Oloo Source Coupling tire Level ode TYPE amp
111. dcopy do the following steps Hardco PY Press DISPLAY Readout Options main gt Display Date and Time side to toggle the setting to On 2 If the date and time are not set a message instructing you to do so is displayed If that is the case skip steps 3 and 4 and continue with step 1 of To Set the Date and Time below Then redo this procedure 3 Press Clear Menu to remove the menu from the display so the date and time can be displayed See Figure 3 27 The date and time is removed from the display when menus are displayed 4 Press HARDCOPY to print your date time stamped hardcopy To Set the Date and Time If you need to set the date and time of the oscilloscope do the following steps 1 Press SHIFT UTILITY gt Config pop up gt Set Date amp Time main gt Year Day Month Hour or Minute en fon Date and Time Display M 500s Chi 220m 12 jul 1994 01 02 13 O Ololololololo Figure 3 27 Date and Time Display 2 Use the general purpose knob to set the parameter you have chosen to the value desired 3 Repeat steps 1 and 2 to set other parameters as desired 4 Press OK Enter Date Time side to put the new settings into effect This sets the seconds to zero 5 Press CLEAR MENU to see the date time displayed with the new settings To Print Directly toa To make your hardcopies use the procedures that follow Hardcopy Devic
112. digitizing oscilloscope can automatically obtain and display a stable waveform of usable size This section describes how to execute autoset Autoset automatically sets up the front panel controls based on the characteristics of the input signal Autoset makes adjustments in these categories Acquisition Display Horizontal Trigger and Vertical NOTE Autoset may change vertical position in order to position the waveform appropriately It always sets vertical offset to O V Autoset the Oscilloscope Do the following steps to automatically setup the oscilloscope 1 Press the Channel Selection button such as CH 1 corresponding to your input channel to make it active 2 Press AUTOSET If you use autoset when one or more channels are displayed the digitizing oscilloscope selects the lowest numbered channel for horizontal scaling and triggering Vertically all channels in use are individually scaled If you use autoset when no channels are displayed the digitizing oscilloscope turns on channel one CH 1 and scales it Reset the Oscilloscope Do the following steps to reset your oscilloscope to its factory default settings Press SETUP gt Recall Factory Setup main gt OK Confirm Factory Init side TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 113 Setting up Automatically Autoset and Reset 3 114 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Sa Signal Path Compensation Signal Path
113. e TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 49 Hardcopy 3 50 Connect to a Hardcopy Device To connect the digitizing oscilloscope directly to a hardcopy device determine which interface and cable the device uses and connect accordingly See Figure 3 28 Hardcopy Device EEL Digitizing Oscilloscope GPIB RS 232 or Centronics Cable Figure 3 28 Connecting the Digitizing Oscilloscope Directly to the Hardcopy Device Print To print a single hardcopy or send additional hardcopies to the digitizing oscilloscope spool queue while waiting for earlier hardcopies to finish printing press HARDCOPY Abort To stop and discard the hardcopy being sent press HARDCOPY again while the hardcopy in process message is still on screen Add to the Spool To add additional hardcopies to the printer spool press HARDCOPY again after the hardcopy in process message is removed from the screen You can add hardcopies to the spool until it is full When the spool is filled by adding a hardcopy the message Hardcopy in Process Press HARDCOPY to abort remains displayed When the printer empties enough of the spool to finish adding the last hardcopy it does so and then removes the message Clear the Spool To remove all hardcopies from the spool press SHIFT gt HARDCOPY MENU gt Clear Spool main gt OK Confirm Clear Spool side The oscilloscope takes advantage of
114. e Rising Edge Main Trigger Source Ch 1 Main Time Base Time Div Main Time Base Main Trigger Level Toomi ode Source amp chi Holdoff TYPE lt Edge gt Figure 3 11 Edge Trigger Readouts To determine the trigger status check the TRIG D READY and ARM status lights in the Trigger control area see Figure 3 26 m When TRIG D is lighted the digitizing oscilloscope has recognized a valid trigger and is filling the posttrigger portion of the waveform m When READY is lighted the digitizing oscilloscope can accept a valid trigger event and it is waiting for that event to occur m When ARM is lighted the trigger circuitry is filling the pretrigger portion of the waveform record TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 21 Edge Triggering TriggerP ositionR elative to the Display andWaveformR ecord Trigger Point Indicator Indicating the Trigger Position on the Waveform Record TriggerBarlndicatingthe Trigger Level on the Waveform Record m When both TRIG D and READY are lighted the digitizing oscilloscope has recognized a valid main trigger and is waiting for a delayed trigger When it recognizes a delayed trigger it will fill in the posttrigger portion of the delayed waveform m When ARM TRIG D and READY are all off the digitizer is stopped To determine where the trigger point is located in the waveform recor
115. e main gt Edge pop up gt Lev el main gt Level Set to TTL Set to ECL or Set to 50 side Level lets you enter the trigger level using the general purpose knob or the keypad You may also change the level using the MAIN LEVEL knob Set to TTL fixes the trigger level at 1 4 V Set to ECL fixes the trigger level at 1 3 V NOTE When you set the volts div smaller than 200 mV the oscilloscope reduces the Set to TTL or Set to ECL trigger levels below standard TTL and ECL levels This happens because the trigger level range is fixed at 12 divisions from the center At 100 mV the next smaller setting after 200 mV the trigger range is 1 2 V which is smaller than the typical TTL 1 4 V or ECL 1 3 V level Set to 50 fixes the trigger level to approximately 50 of the peak to peak value of the trigger source signal To Set Mode amp Holdoff To select the trigger mode and change the holdoff time 1 Press the TRIGGER MENU Mode amp Holdoff main gt Auto or Normal side The trigger modes operate as follows m In Auto mode the oscilloscope acquires a waveform after a specific time has elapsed even if a trigger does not occur The amount of time the oscilloscope waits depends on the time base setting m In Normal mode the oscilloscope acquires a waveform only if there is a valid trigger 2 To change the holdoff time press Holdoff side Enter the value in using the general purpose knob or keypa
116. e 3 56 Save Waveform Menu TDS 400A shown To delete a reference waveform s that you no longer need Press save recall WAVEFORM gt Delete Refs main gt Delete Ref1 Delete Ref2 Delete Ref3 Delete Ref4 or Delete All Refs side To Delete All Waveforms and Setups To remove all stored waveforms and setups see To Delete All Setups and Waveforms on page 3 104 To Display a Saved Waveform TDS 400A Only 3 106 To display a waveform in internal reference memory Press MORE gt Ref1 Ref2 Ref3 or Ref4 main Note that in Figure 3 57 the main menu items Ref2 Ref3 and Ref4 appear shaded while Ref1 does not References that are empty appear shaded in the More main menu TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Saving and Recalling Waveforms Tek Run 100kKS 5 Sample Math Change Math waveform definition ch 100mY q M 500s chi 20m Oloo Math2 Math3 x ja Kel P Ch2 FET CHD mtn Ref1 kerz Refa Relg Ololololololo Figure 3 57 More Menu To Recall a Waveform From Disk To recall a waveform from disk to an internal reference memory press save re call WAVEFORM gt Recall Wfm To Ref Then use the general purpose knob to select the exact file from the resulting scrollbar list Finally press To Ref1 To Ref2 To Ref3 or To Ref4 to complete the operation To Select th
117. e 3 83 Probe Compensated Correctly Probe Overcompensated Probe Undercompensated Figure 3 46 How Probe Compensation Affects Signals To Compensate Passive Probes Do the following steps to compensate your probe 1 Connect the probe to the probe compensation signal on the front panel 2 Press AUTOSET NOTE When you connect an active probe to the oscilloscope such as the P6243 the input impedance of the oscilloscope automatically becomes 50 Q If you then connect a high impedance passive probe you need to set the input impedance back to 1 MQ Step 5 explains how to change the input impedance 3 Press TRIGGER MENU gt Type main gt Edge pop up gt Coupling main gt HF Rej side 4 Press VERTICAL MENU gt Bandwidth main gt 20 MHz side 5 If you need to change the input impedance press Coupling main Then toggle the side menu selection Q to get the correct impedance TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 89 Probe Compensation 6 Press SHIFT ACQUIRE MENU gt Mode main gt Hi Res side 7 Adjust the probe until you see a perfectly flat top square wave on the display Figure 3 47 shows where the adjustment is located Figure 3 47 Probe Adjustment 3 90 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual i Pulse Triggering TDS 510A Only Pulse triggering can be very useful For example you might be testing a product with a glitch
118. e Save Format TDS 400A Only To select the format that the oscilloscope uses to save waveforms to a file press save recall WAVEFORM gt Save Format main gt Internal MathCAd or Spreadsheet side see Figure 3 58 Three formats are available m Internal creates files WFM in the internal format of the oscilloscope MathCad creates files DAT in a format usable by MathCad TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 107 Saving and Recalling Waveforms DAT file data is read line by line and placed into variables in the MathCad document You then do whatever calculations are required The DAT format begins with four values acting as a header containing the record length time per sample interval trigger location and trigger offset followed by a linear array of ASCII floating point Y values The recordLength pre trigger sample count and trigger offset are in samples The horizontal scale per sample is in x units and the y value is in y units m Spreadsheet creates files CSV in a format usable by most spreadsheets Excel Lotus 1 2 3 and Quattro Pro CSV files Comma Separated Values contain comma separated X and Y ASCII values on CRLF terminated lines a 2 dimensional array Each value is a floating point number There is one line for each point in a waveform record The X and Y values are displayed in the units of seconds and Volts All scaling to sample increments and offsetting has been
119. e debugging Use triggered roll with single sequence to capture one triggered event Do the following steps to turn on roll mode 1 Press HORIZONTAL MENU gt Horiz Controls main and set Roll Mode side to Automatic to enable roll mode TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 99 Roll Mode Untriggered Roll New Data Points New Data Points
120. e provides one year of post warranty repair support It is available in one year increments up to two years m CAL Calibrate Service Assurance provides one year of calibration support It is available in one year increments up to five years For further information contact your Tektronix Representative TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual A 5 Appendix A Options and Accessories A 6 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual I Ae Appendix B Packaging for Shipment If you ship the digitizing oscilloscope pack it in the original shipping carton and packing material If the original packing material is not available package the oscilloscope as follows 1 Obtain a corrugated cardboard shipping carton with inside dimensions at least 15 cm 6 in taller wider and deeper than the digitizing oscilloscope The shipping carton must be constructed of cardboard with 170 kg 375 pound test strength If you are shipping the digitizing oscilloscope to a Tektronix field office for repair attach a tag to the digitizing oscilloscope showing the oscilloscope owner and address the name of the person to contact about the oscilloscope the oscilloscope type and the serial number Wrap the digitizing oscilloscope with polyethylene sheeting or equivalent material to protect the finish Cushion the digitizing oscilloscope in the shipping carton by tightly packing dunnage or urethane foam on all sides betwe
121. e r aaa 7 oe H Limit 40mdiv ii 1 100m v M 500s Chi f 108mv OK n f 7 Store Template Mode p Limit Test Limit Test reale Limit Test Sample Sources IEPA LOLO C C C O oO Figure 3 34 Acquire Menu Create Limit Test Template Now create the envelope by specifying the amount of variation from the template that you will tolerate Tolerance values are expressed in fractions of a major division They represent the amount by which incoming waveform data can deviate without having exceeded the limits set in the limit test 4 Press V Limit side Enter the vertical voltage tolerance value 5 Press H Limit side Enter the horizontal time tolerance value 6 When you have specified the limit test template as you wish press OK Store Template side This action creates the template waveform To view the template you created press the MORE button Then press the button corresponding to the destination reference memory you used NOTE When Limit Testing is on the template waveform is dimmed so you can see the waveform through the template When limit testing is off use the Dots display style see Display Modes on page 3 17 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Limit Testing To Select a Limit Test To specify the channel that will acquire the waveforms to be compared against Source the
122. e you have displayed your integrated math waveform use cursors to measure its voltage over time 1 Be sure MORE is selected illuminated in the channel selection buttons and that the integrated math waveform is selected in the More main menu 2 Press CURSOR Mode main gt Independent side gt Func tion main gt H Bars side 3 Use the general purpose knob to align the selected cursor solid to the top or to any amplitude level you choose 4 Press SELECT to select the other cursor 5 Use the general purpose knob to align the selected cursor to the bottom or to any amplitude level you choose 6 Read the integrated voltage over time between the cursors in volt seconds from the A readout Read the integrated voltage vertical units over time between the selected cursor and the reference indicator of the math waveform from the readout See Figure 3 76 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Waveform Integration kunning Waltl AL 1 44uVs Cursor 440nvs Function Integral Math Waveform ch 1 00 YQ q M1 00 us Chis 640mv DEU 1 00uVs 1 00s eA Mode me lsk units H Bars indep seconds Sees S O Ololololololo Figure 3 76 H Bars Cursors Measure an Integral Math Waveform 7 Press Function main gt V Bars side Use the general purpose knob to align one of the two ve
123. each location TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Glossary 3 Glossary Glossary 4 to verify erasure This feature finds use where this digitizing oscilloscope is used to gather security sensitive data such as is done for research or development projects Time base The set of parameters that let you define the time and horizontal axis attributes of a waveform record The time base determines when and how long to acquire record points Trigger An event that marks time zero in the waveform record It results in acquisi tion and display of the waveform Waveform interval The time interval between record points as displayed XY format A display format that compares the voltage level of two waveform records point by point It is useful for studying phase relationships between two waveforms YT format The conventional oscilloscope display format It shows the voltage of a waveform record on the vertical axis as it varies over time on the horizontal axis TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Index Numbers 1 Base Cursor menu 3 120 1 Clocks Cursor menu 3 120 1 seconds Hz Cursor menu 3 120 100 MHz Vertical menu 3 125 20 MHz Vertical menu 3 125 A AC coupling 3 124 AC Main Trigger menu 3 23 Accept Glitch Main Trigger menu 3 93 Accessories A 1 A 6 Optional A 3 Probes A 4 Software A 5 Standard A 3 A 5 Accuracy Glossary
124. ecified by the vertical cursors See Gated Measurements on page 3 77 Automated measurements are not performed just on the displayed portions of waveforms The Digitizing Oscilloscope provides you with 25 automatic measurements Table 3 5 lists brief definitions of the measurements Table 3 5 Measurement Definitions Name id Amplitude Area Ut Burst Width Definition Voltage measurement The high value less the low value measured over the entire waveform or gated region Amplitude High Low Voltage over time measurement The area over the entire waveform or gated region in volt se conds Area measured above ground is positive area below ground is negative Timing measurement The duration of a burst Measured over the entire waveform or gated region Cycle Area Voltage over time measurement The area over the first cycle in the waveform or the first cycle in the gated region in volt seconds Area measured above ground is positive area below ground is negative a Cycle Mean Voltage measurement The arithmetic mean over the first cycle in the waveform or the first cycle in the gated region yyy Cycle RMS Voltage measurement The true Root Mean Square voltage over the first cycle in the waveform or the first cycle in the gated region f Delay Timing measurement The time between the MidR ef crossings of two different traces or the gated region of the traces TDS 420A TDS 430A TDS 460A amp
125. ed TRUE 3 72 Figure 3 38 Measurement Readouts e cece ce ceeee 3 75 Figure 3 39 Measure Menu eee ce cece c cece e ce cecee 3 76 Figure 3 40 Measure Menu Gating cece eee eeee 3 78 Figure 3 41 Measure Menu Reference Levels 3 79 Figure 3 42 Measure Delay Menu Delay To 3 80 Figure 3 43 Snapshot Menu and Readout 000 3 81 Figure 3 44 Probe Cal Menu and Gain Compensation Display 3 85 Figure 3 45 Re use Probe Calibration Data Menu 3 87 Figure 3 46 How Probe Compensation Affects Signals 3 89 Figure 3 47 Probe Adjustment 0 cece cece cere eens 3 90 Figure 3 48 Pulse Trigger Readouts e cece eee eeee 3 91 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Table of Contents Figure 3 49 Figure 3 50 Figure 3 51 Figure 3 52 Figure 3 53 Figure 3 54 Figure 3 55 Figure 3 56 Figure 3 57 Figure 3 58 Figure 3 59 Figure 3 60 Figure 3 61 Figure 3 62 Figure 3 63 Figure 3 64 Figure 3 65 Figure 3 66 Figure 3 67 Figure 3 68 Figure 3 69 Figure 3 70 Figure 3 71 Figure 3 72 Figure 3 73 Figure 3 74 Waveform Figure 3 75 Figure 3 76 Figure 3 77 Figure 3 78 Figure 3 79 Figure 3 80 Figure D 1 Main Trigger Menu Glitch Class Main Trigger Menu Runt Class 06 Connecting the Digitizing Oscilloscope to a Controller
126. elf test If the self test does not detect any problems the status display screen disappears a few seconds after the self test is complete Check the self test results If the self test fails call your local Tektronix Service Center Depending on the type of failure you may still be able to use the oscilloscope before it is serviced Power Off Press the ON STBY switch to turn off the oscilloscope TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 1 5 Start Up Before You Begin Signal Path Compensation SPC lets you compensate your oscilloscope for the current ambient temperature SPC helps ensure maximum possible accuracy for your most critical measurements See Signal Path Compensation in Section 3 for information on this feature 1 6 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Overview This chapter describes the basic concepts of operating the digitizing oscilloscope Understanding the basic concepts of your digitizing oscilloscope helps you use it much more effectively At a Glance quickly shows you how the oscilloscope is organized and gives some very general operating instructions It also contains an overview of the following maps Front Panel Map Rear Panel Map Display Map Basic Menu Operation The Tutorial contains tutorial examples and explains basic system concepts Setting Up for the Examples explains how to set up the digitizing oscillo scope to use the examples Example 1 Display
127. en the carton and the digitizing oscilloscope Allow 7 5 cm 3 in on all sides top and bottom Seal the shipping carton with shipping tape or an industrial stapler CAUTION Do not ship the digitizing oscilloscope with a disk inside the disk drive When the disk is inside the drive the disk release button sticks out This makes the button more prone to damage than otherwise TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual B 1 Appendix B Packaging for Shipment B 2 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual a 7 2 Appendix C Remote Display You can connect a remote display to the VGA connector on the rear panel Table A 3 on page A 3 gives the part number of a properly shielded cable that is commercially available NOTE Both the red and blue signal lines are grounded This configuration results in a green display on a color monitor TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual C 1 Appendix C Remote Display C 2 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual FCC YS Appendix D Programmer Disk The TDS Family Programmer disk is a Microsoft Windows help file that covers operating your oscilloscope using the General Purpose Interface Bus GPIB optional on some digitizing oscilloscopes The disk also includes some example programs The program runs on a PC compatible system with Microsoft Windows or Windows 95 See Figure D 1
128. ensation completes the following actions occur m If offset compensation is required for the probe installed the Probe Offset Compensation message will replace the Probe Gain Compensa tion message m If gain compensation did not complete successfully you may get a Probe is not connected message examine the probe connections to the digitizing oscilloscope be sure the probe tip is properly installed in its retractor and repeat step 9 m If gain compensation did not complete successfully you may get the message Compensation Error This error implies that the probe gain or offset is too great to be compensated You can substitute another probe and continue Have your probe checked by service personnel If the Probe Offset Compensation message is displayed continue with step 15 otherwise continue with step 12 If the Compensation Error message is displayed continue with step 13 otherwise continue with step 18 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Probe Cal KUN 1O0KS 5 sample Probe Gain Compensation 1 Connect probe to front panel signal outputs labeled Probe Compensation SIGNAL and GND 2 Press Compensate Gain to proceed Press Clear Menu to exit d Compensate Gain Coupling Bandwidth 10e Scale position Cal Probe DC Full ett a div initialized Figure 3 44 Probe Cal Menu and Gain Com
129. ent the general purpose Acquisition Status Trigger Position T The value entered with the knob makes coarse adjustments page 3 7 page 3 25 general purpose knob when absent fine adjustments MN Z Tek 250K5 5 Trigger Level 220mv nes coarse Khi S Waveform Record Icon Indicates position of vertical bar cursors in the waveform record When the general purpose knob is activated the knob icon appears here Shows what part of the waveform record is displayed page 3 55 Tek Ha 250kS s 2305 a rigger Level 220m amp aed Sere Se en Coarse Rne fuel Cursor Measurements page 3 117 Trigger level on waveform may be an arrow at right side of in Level 22am screen instead of a bar Set to TTL The side menu with choices of specific actions Set to ECL Waveform Source Set to 50 Trigger Parameters page 3 21 Vertical Scale of Each i Channel page 3 123 l ak T The main menu with choices Horizontal Scale and Time of major actions Base Type page 3 55 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual At a Glance To Operate a Menu TDS 400A 1 Press front panel menu button Tektronix TDS 460A iohsiessioscor tous A m SAV CALL APPLICATION MENU ACQUIKANSNU MEASURE CRUNTA UTILITY cunson BaP M VERTICAL E A TRIGGER E POSITION
130. entify conditions or practices that could result in injury or loss of life CAUTION Caution statements identify conditions or practices that could result in damage to this product or other property Terms on the Product These terms may appear on the product DANGER indicates an injury hazard immediately accessible as you read the marking WARNING indicates an injury hazard not immediately accessible as you read the marking CAUTION indicates a hazard to property including the product Symbols on the Product The following symbols may appear on the product AX A DANGER Protective Ground ATTENTION High Voltage Earth Terminal Refer to Manual Refer to the specifications chapter of the performance verification and specifica tions manual for a listing of certifications and compliances that apply to this product TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Preface Related Manuals This is the User Manual for the TDS 420A TDS 430A TDS 460A and TDS 510A Digitizing Oscilloscopes The Getting Started chapter briefly describes the digitizing oscilloscope prepares you to install it and tells you how to put it into service The Operating Basics chapter covers basic principles of the operation of the oscilloscope These articles help you understand why your oscilloscope works the way it does The Reference chapter teaches you how to perform specific tasks See page 3 1 for a complete list of tasks c
131. eo Class Video Trigger menu 3 127 Video Line Number Cursor menu 3 120 Video Standards 3 127 Video Trigger NTSC Standard 3 128 PAL Standard 3 128 SECAM Standard 3 128 Standards 3 127 Video trigger 3 127 Video Trigger Menu Neg Sync 3 128 Pos Sync 3 128 Video Trigger menu 3 127 Ch1 Ch2 3 128 Custom 3 128 Delay by Lines 3 128 Delay by Time 3 128 Interlaced Field One 3 129 Interlaced Field Two 3 129 NonInterlaced Both Fields 3 129 NTSC 3 128 PAL 3 128 Rate 1 3 129 Rate 2 3 129 Rate 3 3 129 Rate 4 3 129 Scan Parameter 3 129 SECAM 3 128 Source 3 128 Sync Polarity 3 128 TV Delay Mode 3 128 Video Class 3 127 Video Main Trigger menu 3 127 W Waveform Interval Glossary 4 Math 3 139 Off priority 3 112 Waveform clipping See Clipping Waveform differentiation 3 3 Waveform FFTs 3 27 Waveform integration 3 135 Waveform memory 3 106 WAVEFORM OFF button 2 21 3 20 3 112 Index 12 Waveform record FFT 3 33 FFT frequency domain 3 33 length of 3 33 FFT source 3 33 acquisition mode 3 35 defined 3 33 long versus short 3 35 FFT time domain 3 33 Waveform Display menu 3 18 Waveforms And zoom 3 143 Math 3 141 Waveforms Status menu 3 15 Width 2 23 Width trigger 3 96 Width Main Trigger menu 3 93 Window 3 39 Blackman Harris 3 30 3 39 3 4 characteristics of 3 40 Hamming 3 30 3 39 3 41 Hanning 3 30 3 39 3 41 rectangular 3 30 3 39 3
132. ers Define Inputs To set the logic state for each of the input channels Ch1 Ch2 1 Press TRIGGER MENU gt Type main gt Logic pop up gt Class main gt State pop up gt Define Inputs main 2 Choose either High H Low L or Don t Care X side for the first three channels The choices for Ch4 are rising edge and falling edge Define Logic To choose the type of logic function you want applied to the input channels Press TRIGGER MENU gt Type main gt Logic pop up gt Class main gt State pop up gt Define Logic main gt AND OR NAND or NOR side 3 72 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual SS Measuring Waveforms Measurement List There are various ways to measure properties of waveforms You can use graticule cursor or automatic measurements This section describes automatic measurements For cursor and graticule measurements see Taking Cursor Measurements on page 3 117 and Taking Graticule Measurements on page 3 82 Automatic measurements are generally more accurate and are quicker than for example manually counting graticule divisions The oscilloscope continuously updates and displays automatic measurements There is also a way to display all the measurements at once see Take a Snapshot of Measurements on page 3 81 Automatic measurements are taken over the entire waveform record or if you specify gated measurements over the region sp
133. esting requires several more steps See Limit Testing on page 3 63 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual i eee Delayed Triggering The digitizing oscilloscope provides a main time base and a delayed time base The delayed time base like the main time base requires a trigger signal and an input source dedicated to that signal You can only use delay with the edge trigger and certain classes of main pulse triggers This section describes how to delay the acquisition of waveforms There are two different ways to delay the acquisition of waveforms delayed runs after main and delayed triggerable Only delayed triggerable uses the delayed trigger system Delayed runs after main looks for a main trigger then waits a user defined time and then starts acquiring see Figure 3 4 Wait for Wait User specified Acquire Main Time Data Trigger Figure 3 4 Delayed Runs After Main Delayed triggerable looks for a main trigger and then depending on the type of delayed trigger selected makes one of the types of delayed triggerable mode acquisitions listed below see Figure 3 5 Trigger Wait f Wait User specified Time is a Number of Delayed Wait for Delay Acquire ain Trigger Events or Number Trigger Event Data of External Clocks Figure 3 5 Delayed Triggerable After Time waits the user specified time then waits for the next delayed trigger event and then acquires After Events waits for the specified number o
134. et the offset Dual zoom offset is always positive The oscilloscope sets the offset as close to the requested value as possible An offset request of 0 0 insures that the zoom boxes are butted against each other regardless of the zoom factor To Preview Zoom Zoom Preview draws a box around the zoomed portion s of the unmagnified selected waveform It also displays both the magnified and unmagnified waveforms in separate half height graticules see Figure 3 80 To preview zoom press Zoom Mode main gt Preview side In preview mode the zoom magnification factors are not displayed However scale factors for the zoomed waveform are displayed To select which waveforms are controlled by the horizontal and vertical scale and offset controls indicated by photo corners on the graticule corners containing the waveforms see Figure 3 80 press Selected Graticule main gt Upper or Lower side TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 145 Zoom Figure 3 80 Zoom Preview Mode Selected Graticule rr Zoomed Waveforms Zoom Boxes Unzoomed Waveform Reset Zoom Tek Run ere Sample pe Time 2 260m5 zoom Mode AY ie IM D DB CO ca Preview on ja Dual Zoom ON i 3 pam fam 100m M 500us Chi V anii am aa ae Fe 3 ip ee te B DZ Offset l 2 260mM5 E E NE ee a PREE ER EET A LEE E A
135. f delayed trigger events and then acquires After Events Time TDS 510A only waits for the specified number of delayed trigger events then waits the user specified time and then acquires External clks TDS 400A waits for the specified number of external clocks and then acquires TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 11 Delayed Triggering To Run After Delay To Trigger After Delay 3 12 NOTE When using the delayed triggerable mode the digitizing oscilloscope provides a conventional edge trigger for the delayed time base The delayed time base will not trigger if the main trigger type as defined in the Main Trigger menu is logic or if the main trigger type is pulse with the runt trigger class selected You use the Horizontal menu to select and define either delayed runs after main or delayed triggerable Delayed triggerable however requires further selections in the Delayed Trigger menu Do the following steps to set the delayed time base to run immediately after delay 1 Press HORIZONTAL MENU gt Time Base main gt Delayed Only side gt Delayed Runs After Main side 2 Use the general purpose knob to set the delay time If you press Intensified side you display an intensified zone on the main timebase record that shows where the delayed timebase record occurs relative to the main trigger For Delayed Runs After Main mode the start of the intensified zone corresponds to the st
136. f you set the horizontal Clock menu to External and the maximum external sample rate greater than I kc per second 3 If you want an untriggered roll mode press TRIGGER MENU gt Mode main gt Auto side If you want a triggered roll mode press TRIGGER MENU gt Mode main gt Normal side See Figure 3 54 4 If you want a single sequence roll mode press SHIFT gt ACQ MENU gt Stop After main gt Single Sequence side To Turn Off Acquisitions To Turn Off Roll Mode Do the following step to stop acquisitions in roll mode If you are not in Single Sequence you must press RUN STOP to stop roll mode If you are in Single Sequence roll mode acquisitions stop automatically when a complete record is acquired Do the following steps to turn off roll mode NOTE Envelope Average acquisition modes or any of the persistence modes display modes also turn off roll mode You also turn off roll mode if you set the horizontal Clock menu to External and the maximum external sample rate greater than I kc per second 1 Set the Horizontal SCALE to 20 ms per division or faster 2 To turn off roll mode even if the Horizontal SCALE is 50 ms per division or slower press HORIZONTAL MENU gt Horiz Controls main and set Roll Mode side to Off 3 If you are in a single sequence roll mode and want to leave single sequence mode press SHIFT gt ACQ MENU gt Stop After main gt RUN STOP side TDS 420A TDS
137. factors of a zoomed waveform select the waveform and check the zoom readout It shows the selected waveform by number along with the horizontal and vertical expansion factors The zoom readout appears at the top of the display when zoom is on See Figure 3 79 on page 3 145 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 143 Zoom To Zoom a Waveform TDS 400A Only To use Zoom select a waveform turn zoom on and magnify it using the vertical and horizontal scale knobs Select Zoom or Dual Zoom 3 144 1 Press any of the waveform selection buttons CH 1 through CH 4 on the right side of the display Or press MORE and select a math or reference waveform from the More menu Press ZOOM Mode main gt ON side The ZOOM front panel button should light up Adjust the vertical zoom factor for the selected waveform using the vertical SCALE knob Adjust the vertical position of the zoomed waveform using the vertical POSITION knob Adjust the horizontal zoom factor using the horizontal SCALE knob Adjust the horizontal position of the zoomed waveform using the horizontal POSITION knob Press ZOOM gt Lock main gt All Live or None side to choose which waveforms to zoom None only the waveform currently selected can be magnified and positioned horizontally Figure 3 79 Live all live as opposed to reference waveforms can be magnified and positioned horizontally at the same time If
138. ferentiation Optional Description The math waveform is derived from the sampled waveform Since the resultant waveform is a derivative waveform its vertical scale is in vertical units per second its horizontal scale is in seconds Operation To obtain a derivative math waveform 1 Connect the waveform to the desired channel input and select that channel 2 Adjust the vertical and horizontal scales and trigger the display or press AUTOSET 3 Press MORE gt Math1 Math2 or Math3 main gt Change Math Definition side gt Single Wfm Math main See Figure 3 73 4 Press Set Single Source to side Repeatedly press the same button or use the general purpose knob until the channel source selected in step 1 appears in the menu label 5 Press Set Function to side Repeatedly press the same button or use the general purpose knob until diff appears in the menu label 6 Press OK Create Math Wfm side to display the derivative of the waveform you input in step 1 Use the Vertical SCALE and POSITION knobs to size and position your waveform as you require TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 131 Waveform Differentiation Running 35 00MS Ss Average Math Derivative MathWaveform ts pe change Math waveform Ue err peers definition Source Waveform chi 20 0mV gt mi ops Chi U 100mv s 10 0ps _ Mathi Math2 FFT
139. g Reference Measrmnt Setup forchi Measrmnt OFF Histogram Levels CIOlO O O Figure 3 43 Snapshot Menu and Readout To use snapshot obtain a stable display of the waveform to be measured pressing AUTOSET may help Then do the following steps 1 Press MEASURE SNAPSHOT main 2 Press either SNAPSHOT main or AGAIN side to take another snapshot 3 Push Remove Measrmnt Consider the following rules when taking a snapshot m Snapshot does not warn you if a waveform is improperly scaled clipped low signal amplitude low resolution and so on TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 81 Measuring Waveforms Taking Graticule Measurements 3 82 m Be careful when taking automatic measurements on noisy signals You might measure the frequency of the noise and not the desired waveform m Use High Low Setup page 3 78 Reference Levels page 3 78 and Gated Measurements page 3 77 with snapshot exactly as you would when you display individual measurements from the Select Measrmnt menu The oscilloscope provides a graticule for measuring the difference either in time or amplitude between two points on a waveform record Graticule measure ments provide you with quick visual estimates For example you might look at a waveform amplitude and say It is a little more than 100 mV Measure Waveform Amplitude To measure the amplitude
140. gger menu 3 129 Interlaced Field Two Video Trigger menu 3 129 Interleaf 3 47 Interleaf Hardcopy menu 3 48 Internal Clock Horizontal menu 3 59 Interpolation 3 19 Glossary 2 FFT distortion 3 36 linear versus sin x x 3 36 IRE NTSC Cursor menu 3 121 K Knob General purpose 2 8 2 9 2 24 Horizontal POSITION 2 15 3 56 Horizontal SCALE 2 15 3 56 speed up 3 25 Trigger MAIN LEVEL 2 16 Vertical POSITION 2 15 Vertical SCALE 2 15 3 123 L Labelling menu Enter Char 3 44 3 45 Landscape Hardcopy menu 3 48 Laserjet 3 47 Laserjet Hardcopy menu 3 48 Layout Hardcopy menu 3 48 Level Delayed Trigger menu 3 14 Level Main Trigger menu 3 24 3 93 3 96 LF Rej Main Trigger menu 3 23 Limit Test Condition Met Acquire menu 3 65 Limit Test Setup Acquire menu 3 65 Limit Test Sources Acquire menu 3 65 Limit Test Acquire menu 3 65 Limit testing 3 63 Linear interpolation 3 19 Glossary 2 Linear interpolation Display menu 3 19 Logic trigger 3 68 Definitions 3 68 Pattern 3 69 Index 6 State 3 69 Logic triggering 3 67 Low 3 74 Low Ref Measure menu 3 79 MAIN LEVEL 3 24 Main menu 2 7 Main menu buttons 2 3 Glossary 2 Main Scale Horizontal menu 3 58 Main Trigger Menu Falling edge 3 24 Rising edge 3 24 Main Trigger menu 3 22 3 69 3 92 3 94 AC 3 23 Accept Glitch 3 93 AND 3 71 3 72 Auto 3 24 3 70 3 93 Ch1 Ch2
141. giece eialeseeaueceseiaeiecea we os 3 20 TiO iC TIS SOLS 55360 5 5 55 ow a 840 so arene g2ace siatene anode a and oases 3 68 Measurement Definitions cceceeeeceees 3 73 Probe Cal Status ico cee ib ne dein eee laisse aroia eia wile 3 86 Pulse Trigger Definitions 0c cece wee ceees 3 91 International Power Cords ceceececeeees A 2 Standard Accessories sssssesesssesesesesoeo A 3 Optional Accessories 0c eee e cece cece eees A 3 Compatible Probes ccc cece ccc ce sce ccecees A 4 Accessory Software ccc cee ce cece eee e ee eeenes A 5 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual iii General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it Only qualified personnel should perform service procedures Injury Precautions Use Proper Power Cord To avoid fire hazard use only the power cord specified for this product Avoid Electric Overload To avoid electric shock or fire hazard do not apply a voltage to a terminal that is outside the range specified for that terminal Avoid Overvoltage To avoid electric shock or fire hazard do not apply potential to any terminal including the common terminal that varies from ground by more than the maximum rating for that terminal Avoid Electric Shock To avoid injury or loss of life do not connect or disconnect probes or test leads
142. gt Repetitive Signal main gt ON or OFF side 3 8 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Acquisition Modes ON Enable ET uses both the real time and the equivalent time features of the digitizing oscilloscope OFF Real Time Only limits the digitizing oscilloscope to real time sampling If the digitizing oscilloscope cannot accurately get enough samples for a complete waveform the oscilloscope uses the interpolation method selected in the display menu to fill in the missing record points To Stop After To choose the event that signals the oscilloscope to stop acquiring waveforms do the following step Press SHIFT ACQUIRE MENU gt Stop After main gt RUN STOP button only Single Acquisition Sequence or Limit Test Condition Met side see Figure 3 3 Tek Run 100kKS 5 Sample Stop After RUN STOP button only Single J Acquisition Sequence Limit Test Condition Met Toomv TO M 500s Chit g6mV Mode Repetitive Stop Limit Test Limit Test create Signal Limit Test Sample N RZS button Setup Sources Template DOlolololololo Ololololo Figure 3 3 Acquire Menu Stop After RUN STOP button only side lets you start or stop acquisitions by toggling the RUN STOP button Pressing the RUN STOP button once stops the acquisitions The upper left hand co
143. hall be responsible for paying all shipping charges duties taxes and any other charges for products returned to any other locations This warranty shall not apply to any defect failure or damage caused by improper use or improper or inadequate maintenance and care Tektronix shall not be obligated to furnish service under this warranty a to repair damage resulting from attempts by personnel other than Tektronix representatives to install repair or service the product b to repair damage resulting from improper use or connection to incompatible equipment c to repair any damage or malfunction caused by the use of non Tektronix supplies or d to service a product that has been modified or integrated with other products when the effect of such modification or integration increases the time or difficulty of servicing the product THIS WARRANTY IS GIVEN BY TEKTRONIX IN LIEU OF ANY OTHER WARRANTIES EXPRESS OR IMPLIED TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE TEKTRONIX RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES Table of Contents General Safety Summary ccc cece
144. he magnitude of the frequency is greater than this threshold then its phase angle will be displayed However if it is less than this threshold then the phase angle will be set to zero and be displayed as zero degrees or radians The waveform reference indicator at the left side of the graticule indicates the level where phase is zero for phase FFTs It is easier to determine the level of phase suppression you need if you first create a frequency FFT math waveform of the source and then create a phase FFT waveform of the same source Do the following steps to use a cursor measurement to determine the suppression level 1 Do steps 1 through 7 of Operation that begins on page 3 28 Select dBV RMS side for the Set FFT Vert Scale to side 2 Press CURSOR Mode main gt Independent side gt Func tion main gt H Bars side Use the general purpose knob to align the selected cursor to a level that places the tops of the magnitudes of frequen cies of interest above the cursor but places other magnitudes completely below the cursor 3 Read the level in dB from the readout Note the level for use in step 5 4 Press MORE main gt Change Waveform Definition menu side Press Set FFT Vert Scale to side repeatedly to choose either Phase rad or Phase deg 5 Press Suppress Phase at Amplitudes side Use the general purpose knob or keypad to set phase suppression to the value obtained using the H Bar cursor Do not ch
145. he scale values When a waveform aliases it appears on screen with a frequency lower than the actual waveform being input or it appears unstable even though the light next to TRIG D is illuminated Aliasing occurs because the oscilloscope is not sampling the signal fast enough to construct an accurate waveform record see Figure 3 32 In order to represent a signal accurately and avoid aliasing you must sample the signal more than twice as fast as the highest frequency component For example a signal with frequency components of 400 MHz would need to be sampled at a rate faster than 800 Megasamples second Actual High F requency Waveform Apparent Low Frequency Waveform Due to Aliasing Sampled Points gt Figure 3 32 Aliasing One simple way to check for aliasing is to slowly change the horizontal scale time per division setting If the shape of the displayed waveform changes drastically you may have aliasing There are various ways to prevent aliasing Try adjusting the horizontal scale or simply press the AUTOSET button You can also counteract some aliasing by changing the acquisition mode For example if you are using the sample mode and suspect aliasing you may want to change to the peak detect mode Since the peak detect mode searches for samples with the highest and lowest values it can detect faster signal components over time TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Horizontal
146. hold at all When Negative is set in the Polarity side menu the upper threshold must be first crossed going negative then recrossed going positive without crossing the lower threshold at all TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 95 Pulse Triggering Width Operation Polarity Trig When Level 3 96 When Either is set in the Polarity side menu one threshold must be first crossed going in either direction then recrossed going in the opposite direction without crossing the other threshold at all m Regardless of the polarity setting triggering occurs at the point the runt pulse recrosses its first threshold When you select the pulse class Width the oscilloscope will trigger on a pulse narrower or wider than some specified range of time defined by the upper limit and lower limit To define whether the pulses are positive or negative Press TRIGGER MENU gt Type main gt Pulse pop up gt Class main gt Width pop up gt Polarity main gt Positive or Negative side To establish the range of widths in units of time the trigger source will search for and whether to trigger on pulses that are outside this range or ones that fall within the range 1 Press TRIGGER MENU gt Type main gt Pulse pop up gt Class main gt Width pop up gt Trig When main 2 Press Within Limits side to trigger on pulses that fall within the specified range To trigger on pulse
147. i LE Mode lock Graticule Reset Upper To reset all zoom factors to their defaults press ZOOM gt Reset main gt Reset All Factors side To reset only live waveform zoom factors to their defaults press ZOOM gt Reset main gt Reset Live Factors side Press ZOOM Mode main gt Off side to return to normal oscilloscope non zoom operation To Zoom a Waveform TDS 510A Only 3 146 To use Zoom turn zoom on and magnify the waveforms using the vertical and horizontal scale knobs 1 Press ZOOM gt ON side The ZOOM front panel button should light up 2 Choose which waveforms to zoom by repeatedly pressing Horizontal Lock side None Live or All NOTE Although zoom must be turned on to control which waveforms zoom affects the setting for Horizontal Lock affects which waveforms the horizontal control positions whether zoom is on or off TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual a os Appendix A Options and Accessories Options Option 02 Front Cover and Pouch TDS 400A Only Option 05 Video Trigger Option 13 RS 232 Centronics Hardcopy Interface Option 1K Instrument Cart TDS 510A Only Option 1R Rackmounted Digitizing Oscilloscope Option 2F Advanced DSP Math Option 1M 120 000 Point Record Length TDS 400A Only This appendix describes the various options and accessories that are available f
148. ice Assurance A 5 Set Ist Source to More menu 3 140 Set 2nd Source to More menu 3 140 Set Function to More menu 3 139 SET LEVEL TO 50 button 3 25 Set Levels in units Measure menu 3 78 Set operator to More menu 3 140 Set Single Source to More menu 3 139 Set Thresholds Main Trigger menu 3 69 Set to 10 Horizontal menu 3 59 Set to 50 Horizontal menu 3 59 Set to 50 Main Trigger menu 3 24 3 25 Set to 90 Horizontal menu 3 59 Set to ECL Main Trigger menu 3 24 Set to TTL Main Trigger menu 3 24 Set to Zero Vertical menu 3 125 Setting Up for the Examples 2 11 Setup menu 2 12 Setups Save and recall 3 103 Shipping B 1 side menu 2 7 Side menu buttons 2 3 SIGNAL OUTPUT BNC 2 6 Signal Path Compensation 1 5 1 6 3 115 Sin x x interpolation 3 19 Glossary 2 Sin x x interpolation Display menu 3 19 Single Acquisition Sequence Acquire menu 3 10 SINGLE TRIG button 3 10 3 25 3 26 Single Wfm Math More menu 3 139 Slope 3 21 Slope Delayed Trigger menu 3 14 Slope Main Trigger menu 3 24 Snapshot Readout 3 81 Snapshot of Measurements 2 25 3 81 Snapshot Measure menu 3 81 Software 1 1 Software version 3 15 Source Delayed Trigger menu 3 13 Source Main Trigger menu 3 23 3 93 3 94 Source Video Trigger menu 3 128 Spooler Hardcopy 3 50 Start up 1 3 State trigger 3 72 State Main Trigger menu 3 69 3 72 STATUS button 3 15 Status menu
149. in the power supply The glitch appears once a day So instead of sitting by and waiting for it to appear you can use pulse triggering to automati cally capture your data Figure 3 48 shows the pulse trigger readouts Table 3 7 describes the choices for pulse triggers Trigger Class Runt n2 1 00 v M S00ys Runt chi a Source Polarity lt Runt gt chi Positive Ololololololo ode amp Holdoff Figure 3 48 Pulse Trigger Readouts Table 3 7 Pulse Trigger Definitions Name Definition i Glitch positive Triggering occurs on positive spike widths less than the specified glitch time Glitch negative Triggering occurs on negative spike widths less than the specified glitch time may Glitch either Triggering occurs on positive or negative widths less than the specified glitch time fig Runt positive Triggering occurs on a positive pulse that crosses one threshold going positive but fails to cross a second threshold before recrossing the first going negative qe Runt negative Triggering occurs on a negative going pulse that crosses one threshold going negative but fails to cross a second threshold before recrossing the first going positive TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 91 Pulse Triggering Table 3 7 Pulse Trigger Definitions Cont Name Definition aie Runt either Triggering occurs on
150. ing a Waveform teaches you how to reset the digitizing oscilloscope display and adjust waveforms and use the autoset function Example 2 Displaying Multiple Waveforms explains how to add control and delete multiple waveforms Example 3 Taking Automated Measurements introduces you to the automated measurement system Example 4 Saving Setups discusses saving and recalling the digitizing oscilloscope setups Triggering explains how to set the triggers to convert unstable displays or blank screens into meaningful waveforms Scaling and Positioning Waveforms explains how to change the position and displayed size of waveforms Measurements explains using automated cursor and graticule measurements to display numeric information on the displayed waveforms To explore these topics in more depth and to read about topics not covered in this chapter see Reference Page 3 1 lists the topics covered TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 2 1 Overview 2 2 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Ly a At a Glance The At a Glance section contains illustrations of the display and the front and rear panels These illustrations help you understand and operate the digitizing oscilloscope This section also contains a visual guide to using the menu system Front Panel Map Left Side Tektronix TDS 510A ieminedscioscore S00 MSk Side Menu Buttons page 2 8 page 3
151. irs and a frame Frame displays just a frame NTSC provides a grid useful for measuring NTSC class waveforms PAL provides a grid useful for measuring PAL class waveforms TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 19 Display Modes Select the Display Format 3 20 Lou o NOTE Selecting either NTSC or PAL graticule automatically changes the vertical scale position settings coupling and sets to zero any vertical offset of any channel displayed These settings are not restored after switching to other graticule types There are two display formats YT and XY YT is the conventional oscilloscope display format It shows a signal voltage the vertical axis as it varies over time the horizontal axis XY format compares the voltage levels of two waveform records point by point That is the digitizing oscilloscope displays a graph of the voltage of one waveform record against the voltage of another waveform record This mode is particularly useful for studying phase relationships To set the display axis format Press DISPLAY Format main gt XY or YT side When you choose the XY mode the input you have selected is assigned to the X axis and the digitizing oscilloscope automatically chooses the Y axis input see Table 3 3 Table 3 3 XY Format Pairs X Axis Channel User Selectable Ch1 Ch 3 TDS 420A TDS 460A and TDS 510A only Y Axis Channel Fixed Ch2 Ch 4 TDS
152. is different from the time set for True for more than or True for less than In Figure 3 37 the delay between the vertical bar cursors is the time the logic function is TRUE Since this time is more 216 us than that set in the True for more than menu item 150 us the oscilloscope issues the trigger at that point not at the point at which it has been true for 216 us TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 71 Logic Triggering Stopped 4671 Acquisitions True gt 150 0000us gt CA 216Ns gt Logic Pattern P Trig when k y s s Goes k x TRUE Time Logic Function is TRUE LogicF unction AND BecomesTRUE hil Goes SEd FALSE n EE A EEEE A EEEO ERE ARBRE sesh easel TRUE for less than Logic Function Becomes FALSE and SER E fo ens Triggers Acquisition ij e oc e EA EUREIT e Time Logic Function Mustbe TRUE CI O O O pee es ae iz ine caer n _ Type Class Logic When amp stogic gt lt Pattern gt Inputs AND True gt Thresholds Holdoff Ololololololoj Figure 3 37 Logic Trigger Menu Time Qualified TRUE State Operations When you select State logic triggering the oscilloscope uses channel 4 as a clock for a logic circuit made from the rest of the channels See page 3 69 for details on operations common to both pattern and state trigg
153. is section describes how to use zoom and how it interacts with the selected waveform It also describes how interpolation affects zoom Use Zoom when you wish to temporarily expand a waveform to inspect a small feature s on that waveform Using With Waveforms When zooming vertically the digitizing oscilloscope expands or contracts the selected waveform only Also the oscilloscope only positions the selected waveform when in zoom When zooming horizontally zoom expands either the selected waveform all live waveforms or all live and reference waveforms depending on the setting for Horizontal Lock in the Zoom menu Interpolation and Zoom When you zoom in on a waveform on the display you expand a portion of it The digitizing oscilloscope may need to show more points for that portion than it has acquired If it needs to do this it interpolates The instrument can interpolate in either of two ways linear or sin x x When you zoom the display redraws the waveforms using the interpolation method you selected in the Display menu linear interpolation or sin x x If you selected sin x x the default it may introduce some overshoot or undershoot to the waveform edges If that happens change the interpolation method to linear following the instructions on page 3 19 To differentiate between the real and interpolated samples set the display style to Intensified Samples Checking the Zoom Factors To quickly determine the zoom
154. isplay press Set to 0 divs side Offset Offset lets you subtract DC bias from the waveform For example you might be trying to look at a 100 mV ripple on top of a 15 V supply Using offset you can display the ripple and scale it to meet your needs To use offset press VERTICAL MENU gt Offset main Then use the general purpose knob to set the vertical offset If you want to reset the offset to zero press Set to 0 V side TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 125 Vertical Control 3 126 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual SSS Le Video Triggering TDS 400A If you have a TDS 510A with Option 05 refer to the TDS Family Option 05 Video Trigger Interface Instruction manual for video trigger operating informa tion The optional Video Trigger menu lets you select the source polarity class mode and holdoff It also gives you the option to delay by lines or time and lets you trigger on the first field second field or both A video trigger event occurs when a video signal generates a horizontal or vertical sync pulse To Select Video Triggering To bring up the Video Trigger menu Press the TRIGGER MENU gt Type main gt Video side see Figure 3 68 r Tek Run Ne Sample 100 Edge ela ode TYPE Class polarity Mode Ae amp lt Video gt lt NTSC gt Negative Lines Odd Fields Holdoff O O C C C O
155. ize waveform records as long as the total is less than the capacity of nonvolatile waveform memory To save a waveform do the following steps 1 Select the channel that has the waveform you want to save NOTE Before doing step 2 that follows note that if you use a reference memory location labeled active see Figure 3 56 you overwrite the waveform that was previously stored there 2 To store a waveform internally press save recall WAVEFORM gt Save Waveform main gt Ref1 Ref2 Ref3 or Ref4 side NOTE Before doing step 3 on a TDS 400A note the current Save Format see Figure 3 58 If you desire to save to a different format see To Select the Save Format on page 3 107 3 To store a waveform to disk press save recall WAVEFORM gt Save Waveform main To File side Then use the general purpose knob to select the exact file from the resulting scrollbar list Finally press Save To Selected File to complete the operation TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 105 Saving and Recalling Waveforms To Delete Waveforms Tek Run 100KS 5 Sample Save Waveform uJ To File To Refl active To Ref2 empty To Ref3 empty To Ref4 Zoomy C M 500s Chif 300mv empty Recall E Delete Save File Format Hir to Ref Refs interna utilities Ololololololo Oloo i Figur
156. l value Probe compensation Adjustment that improves the low frequency response of a probe Real time sampling A sampling mode where the digitizing oscilloscope samples fast enough to completely fill a waveform record from a single trigger event Use real time sampling to capture single shot or transient events Record length The specified number of samples in a waveform Reference memory Memory in a oscilloscope used to store waveforms or settings You can use that waveform data later for processing The digitizing oscilloscope saves the data even when the oscilloscope is turned off or unplugged Roll An acquisition mode useful at slow Horizontal SCALE settings Roll mode allows the waveform to be viewed as it is acquired point by point The waveform appears to roll across the display Sample interval The time interval between successive samples in a time base For real time digitizers the sample interval is the reciprocal of the sample rate For equivalent time digitizers the time interval between successive samples represents equivalent time not real time Sampling The process of capturing an analog input such as a voltage at a discrete point in time and holding it constant so that it can be quantized Two general methods of sampling are real time sampling and equivalent time sampling Tek Secure This feature erases all waveform and setup memory locations setup memories are replaced with the factory setup Then it checks
157. lay to 2 Press Measure Delay to side repeatedly to choose the delay to waveform TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 79 Measuring Waveforms 3 80 The steps just performed select the waveform you want to measure fo note that the waveform you are measuring the delay from is the selected wave form See Figure 3 42 Tek Run 100kKS 5 Sample Measure Delay to Ch1 Delay from Selected Wim Measure e met to ae Verify or change the waveform to which Delay will be measured the Search Direction and the Edges at which to measure When you are satisfied with the selections press Create Measurement Press CLEAR MENU to return to the Measure chi menu without creating the Delay measurement 10m Y OK Create DI C COI O O Measurement Delay To Edges Chi F F Figure 3 42 Measure Delay Menu Delay To 3 Press MEASURE gt Select Measrmnt main gt Delay side gt Edges main A side menu of delay edges and directions appears Choose from one of the combinations displayed on the side menu using the following information m The selection you choose defines which edges you want the delayed measurement to be made between m The upper waveform on each icon represents the from waveform and the lower one represents the to waveform m The direction arrows let you specify
158. line cursors however adjusting the period also selects the appropriate scan rate Also choosing a scan rate incompatible with the current scan period setting forces the scan period to the minimum period implied by the selected rate By toggling the button next to the Interlaced option you can trigger on interlaced field one interlaced field two or both fields noninterlaced TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 129 Video Triggering To Set Mode amp Holdoff See To Set Mode and Holdoff on page 3 24 for mode and holdoff information a Y Tek Run eal Sample 100 Odd sical Even All 20 meth Sil ne elay ode TYPE Class aure polarity Mode re a lt Video gt lt TS gt Negative tines an Holdoff D alo D O D O O Figure 3 71 Video Trigger Scan Parameter Tek Run 1 00MS s5 Scan Period 66 667ys5 Scan Rate amp 1 Interlace 66 6675 6 40 more 1of2 CI C O O et source ne V Delay elie Mode TYPE Class Chi Polarity Mode amp amp lt Video gt lt Custem gt Negative tines ece Holdoff o Ololololololo Figure 3 72 Video Trigger Scan Rate amp Interlace 3 130 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Ae Waveform Dif
159. ll 3 103 Save Recall Waveform 3 105 Setup 2 12 Status 3 15 3 16 Utility 3 47 3 97 Video Trigger 3 127 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Index 7 Index Mid Ref Measure menu 3 79 Mid2 Ref Measure menu 3 79 Min Max Measure menu 3 78 Minimum 3 74 Mode amp Holdoff Main Trigger menu 3 24 3 70 3 93 Mode Acquire menu 3 8 Model number location 2 3 MORE button 3 64 3 106 3 111 3 112 3 139 More menu 3 106 3 31 3 139 Blackman Harris 3 30 Change Math waveform definition 3 28 3 131 3 135 3 139 dBV RMS 3 29 diff 3 131 Dual Wfm Math 3 140 FFT 3 28 Hamming 3 30 Hanning 3 30 intg 3 135 Linear RMS 3 29 Math1 Math2 Math3 3 28 3 131 3 135 Math1 2 3 3 141 OK Create Math Waveform 3 35 3 140 Phase deg 3 29 Phase rad 3 29 Rectangular 3 30 Reference waveform status 3 106 Set 1st Source to 3 140 Set 2nd Source to 3 140 Set FFT Source to 3 29 Set FFT Vert Scale to 3 29 Set FFT Window to 3 29 Set Function to 3 139 Set Function to 3 131 3 135 Set operator to 3 140 Set Single Source to 3 139 Set Single Source to 3 131 3 135 Single Wfm Math 3 131 3 135 3 139 N NAND Main Trigger menu 3 68 NAND Main Trigger menu 3 71 3 72 Neg Sync Video Trigger menu 3 128 Negative duty cycle 3 74 Negative overshoot 3 74 Negative width 3 74 Negati
160. lt tagic gt lt Pattern gt AND Gees TRUE Holdoff Ololololololo Figure 3 36 Logic Trigger Menu To change the holdoff time and select the trigger mode using this menu item Press TRIGGER MENU gt Type main gt Logic pop up gt Class main gt Pattern or State pop up gt Mode amp Holdoff main gt Auto or Normal side See To Set Mode and Holdoff on page 3 24 for more information When you select Pattern the oscilloscope will trigger on a specified logic combination of the four input channels See page 3 69 for details on operations common to both pattern and state triggers To set the logic state for each of the input channels Ch1 Ch2 1 Press TRIGGER MENU gt Type main gt Logic pop up gt Class main gt Pattern pop up gt Define Inputs main gt Ch1 Ch2 Ch3 or Ch4 side 2 Repeatedly press each input selected in step to choose either High H Low L or Don t Care X for each channel TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Logic Triggering Define Logic To choose the logic function you want applied to the input channels see page 3 68 for definitions of the logic functions Press TRIGGER MENU gt Type main gt Logic pop up gt Class main gt Pattern pop up gt Define Logic main gt AND OR NAND or NOR side Define a Time Qualified You can also time qualify a pattern logic
161. lude in the FFT To speed up oscilloscope response when using long record lengths you can save your source waveform in a reference memory and perform an FFT on the saved waveform That way the DSP will compute the FFT based on saved static data and will only update if you save a new waveform Acquisition Mode Selecting the right acquisition mode can produce less noisy FFTs Set up in Sample or Normal Mode Use sample mode until you have set up and turned on your FFT Sample mode can acquire repetitive and nonrepetitive waveforms and does not affect the frequency response of the source waveform Hi Res and Average Reduce Noise After the FFT is set up and displayed it might be useful to turn on Hi Res mode to reduce the effect of noise in the signal However Hi Res does affect the frequency response of the source waveform TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 35 Fast Fourier Transforms Zoom and Interpolation Undersampling Aliasing 3 36 If the pulse is repetitive Average mode may be used to reduce noise in the signal at a cost of slower display response However averaging does affect the frequency response of the source waveform Do not use Peak Detect and Envelope mode They can add significant distortion to the FFT results Once you have your waveform displayed optimally you may magnify or reduce it vertically and horizontally to inspect any feature you desire Just be sure the FFT waveform is
162. n Figure 2 3 shows the Setup main menu OK Confirm Factory Init Menu Item and Button M 100ns Chif 283m Factory Init Recall Factory Setup Menu Item and Button 2 12 Figure 2 3 The Displayed Setup Menu 2 Press the button directly below the Recall Factory Setup menu item The display shows side menus along the right side of the screen The buttons to select these side menu items are to the right of the side menu Because an accidental instrument reset could destroy a setup that took a long time to create the digitizing oscilloscope asks you to verify the Recall Factory Setup selection see Figure 2 3 3 Press the button to the right of the OK Confirm Factory Init side menu item TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Tutorial NOTE This manual uses the following notation to represent the sequence of selections you made in steps 1 2 and 3 Press save recall SETUP gt Recall Factory Setup main gt OK Confirm Factory Init side D Note that a clock icon appears on screen The oscilloscope displays this icon when performing operations that take longer than several seconds 4 Press SET LEVEL TO 50 see Figure 2 4 to be sure the oscilloscope triggers on the input signal A TRIGGER E MAIN LEVEL DELAYED TRIG TRIGGER MENU CO SET LEVEL TO 50 SET LEVELTO 50 Button D Figure 2 4 SET LEVEL TO 50 Button
163. n parameters to talk to a printer attached directly to Parameters the oscilloscope GPIB port 1 Press SHIFT UTILITY System main gt I O pop up gt Config ure main see Figure 3 26 2 Press Hardcopy Talk Only side Tek Run 100kKS 5 Sample GPIB Address 1 GPIB Configuration a Talk Listen Address na T Hardcopy Talk Only Off Bus 200mv ch2 100mV M 500ys chi 20my DI CI OCI O O E ee SSIES ee ee eee eee See ee System Pork Talk lsten lt bfOr lt GPIB gt GGGl aG aO Figure 3 26 Utility Menu System I O To Set Hardcopy To specify the hardcopy format layout and type of hardcopy port Parameters Press SHIFT HARDCOPY MENU 2 Press Format main gt Thinkjet Deskjet Laserjet Epson DPU 411 DPU 412 PCX TIFF BMP EPS Image EPS Mono EPS Color EPS stands for Encapsulated Postscript Interleaf or HPGL side Press more side to see all of these format choices 3 Press SHIFT HARDCOPY MENU gt Layout main gt Landscape or Portrait side 4 Press SHIFT HARDCOPY MENU gt Port main to specify the output channel to send your hardcopy through Select one of the optional hardcopy ports GPIB RS 232 Centronics or File 3 48 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Hardcopy To Date Time Stamp Your To date and time stamp your har
164. ng 3 28 procedure for measuring 3 31 record length 3 34 Index 4 reducing noise 3 35 undersampling 3 36 zero phase reference 3 37 FFT time domain record defined 3 33 File System 3 43 File Utilities File Utilities menu 3 43 File Utilities menu 3 43 Confirm Delete 3 45 Copy 3 45 Create Directory 3 45 Delete 3 44 File Utilities 3 43 Format 3 46 Overwrite Lock 3 45 Print 3 45 Rename 3 44 Filter Display menu 3 19 Fine Scale Vertical menu 3 125 Firmware version 3 15 Fit to screen Horizontal menu 3 57 FORCE TRIG button 3 25 Format Display menu 3 20 Format File Utilities menu 3 46 Format Hardcopy menu 3 48 Frame Display menu 3 19 Frequency 2 23 3 74 Front Cover removal 4 Front panel 2 4 2 5 Full Display menu 3 19 Full Vertical menu 3 125 Function Cursor menu 3 118 3 120 Fuse 1 3 2 6 G Gated Measurements 3 77 Gating Measure menu 3 77 General purpose knob 2 8 2 9 2 24 Glitch trigger 3 91 Glitch Main Trigger menu 3 92 3 93 GND coupling 3 124 Goes FALSE Main Trigger menu 3 69 Goes TRUE Main Trigger menu 3 69 GPIB 2 6 3 97 Procedures for using 3 97 Selecting and configuring the port 3 97 GPIB Programming D 1 GPIB Hardcopy menu 3 48 GPIB Utility menu 3 97 Graticule 3 19 Measurements 3 82 Graticule Display menu 3 19 TDS 420A TDS 430A TDS 460A amp TDS 510A
165. ng page 3 127 2 4 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual At a Glance Front Panel Map Right Side TDS 510A MeasurementS ystem page 3 73 Saving and Recalling Waveforms page 3 105 File System page 3 43 Cursor Measurements page 3 117 Hardcopy page 3 47 File System page 3 43 Display Modes page 3 17 Remote Communication page 3 97 Cursor Measurements page 3 117 Acquisition Modes page 3 5 Ce REC LL appui aTion m ME U gt AGAUIRE MENU 4 AUTOSET J WAVEFORN ME w URE CHARLWOPY C RUN STOP Autoset page 3 113 gt C__ STATUS Help page 3 3 Status page 3 15 Saving and Recalling Setups page 3 103 Resetthe Oscilloscope page 2 12 Selecting Channels page 3 111 A VCATI DELAYED TRIG TRIGGER EN SET LEVEL TO 50 SINGLE TRIG FORCE TRIG C Oe EP m Zz g m D t J O OG r 10pF E 100V pk S5V RMS Waveform Math page 3 139 Vertical Control Ground page 3 123 Zoom page 3 143 Horizontal Control page 3 55 Removing Waveforms page 3 111 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Triggering page 3 25 Delay Triggering page 3 11 Edge Triggering page 3 21 Logic Triggering page 3 67 Pulse Triggering page 3 91 Probe Compensation page 3 89
166. ntal Control Limit Testing Measuring Waveforms Probe Cal Probe Compensation Pulse Triggering Remote Communication Roll Mode Saving and Recalling Setups Saving and Recalling Waveforms Selecting Channels Setting up Automatically Signal Path Compensation Taking Cursor Measurements Vertical Control Video Triggering Waveform Differentiation Waveform Integration Waveform Math Zoom Many of these tasks list steps you perform to accomplish the task You should read Conventions on page x of Preface before reading about these tasks TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Overview 3 2 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Accessing Help The on line help system provides brief information about each of the digitizing oscilloscope controls To use the on line help system Press HELP to display information on any front panel button knob or menu item see Figure 3 1 Press HELP again to return to the regular operating mode Whenever the oscilloscope is in help mode pressing any button except HELP or SHIFT turning any knob or pressing any menu item displays help text on the screen that discusses that control On line help is available for each menu selection displayed at the time the HELP button is first pressed If you are in help mode and want to see help on selections from non displayed menus you first exit help mode display the menu you want information on and press
167. nterface Complex Interface No Doesn t Initialized Initialized Matter Yes Initialized probe data is retained Initialized probe data is retained Yes Power On Can not detect different probe Display a Reuse Probe Cal d Probe Pass Calibration Data Menu Different probe Initialized Different probe Initialized Yes Disconnect Initialized Initialized Probe Yes Connect Can not detect different probe Display Reuse Probe Cal d Probe Pass Probe Calibration Data Menu Different probe Initialized Different probe Initialized 1 Refers to a channel input that was successfully compensated at the time Probe Cal was last executed for the input channel If no probe is connected the probe status in the vertical main menu is always initialized A probe with a simple interface is a probe that can convey very limited information to the oscilloscope Most passive probes have simple interfaces A probe with a complex interface is a probe that can convey additional information For instance it might automatically set the oscilloscope input channel impedance to match the probe send the oscilloscope a unique probe identification number etc Some optical probes and most active probes have complex interfaces 3 86 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Probe Cal If the Re use Probe Calibration data menu see Figure 3 45 is displayed choose one of the following options To use the Probe Cal data last stored for that channel
168. o O C C C O Figure 3 68 Main Trigger Menu Video Type To Select Video Class To select predefined setups NTSC PAL or SECAM or customize the setup Press the TRIGGER MENU gt Type main gt Video pop up Class main NTSC PAL SECAM or Custom pop up Figure 3 69 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 127 Video Triggering To Select the Source To Set Sync Polarity e T To Specify TV Delay Mode 3 128 NTSC has a line rate of 525 lines per frame and a field rate of 60 Hz PAL has a line rate of 625 lines per frame and a field rate of 50 Hz SECAM has a line rate of 625 lines per frame and a field rate of 50 Hz Custom lets you specify the frequency range of the video signal The different ranges are listed in the Scan Parameter side menu discussed later in this section Tek Run EEEN Sample 100 1 A hh ne elay ode TYPE Source polarity mode RAIA amp lt Video gt lt TS gt Negative tines Holdoff COLO C O om MICIO O O Figure 3 69 Video Trigger Menu Class To select which source you want the trigger to come from Press TRIGGER MENU gt Source main gt Chl Ch2 Ch3 or Ch4 side Negative polarity is the standard for horizontal and vertical synch pulses To set the sync
169. o trigger bars are displayed when delay triggerable acquisitions are displayed The trigger bar is a visual indicator of the trigger level 4 Press Display Date Time side to turn it on or off Push Clear Menu to see the current date and time See To Date Time Stamp Your Hardcopy on page 3 49 for more information TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Display Modes Tek Run 50 0MS s Sample Display Date Time ON Readout Options Display T Trigger P oint Indicator Trigger Point Trigger Bar Style tong Trigger Bar Long Style 0r Trigger Bar Short Style Z Display Date Time Select Interpolation Filter Select the Graticule Type Oloo oj 1 00 SM ious Chi i74 V Style Readout Filter Graticule Format vectors intensity Singx x Full VE Ololololololo Figure 3 10 Trigger Point and Level Indicators To select the display filter type sin x x interpolation and linear interpolation Press DISPLAY gt Filter main gt Sin x x Interpolation or Linear Inter polation side To select the graticule type Press DISPLAY gt Graticule main gt Full Grid Cross Hair Frame NTSC or PAL side Full provides a grid cross hairs and a frame Grid displays a frame and a grid Cross Hair provides cross ha
170. obe First do steps 1 and 2 below and then perform the instructions found under Probe Compensation on page 3 89 Then continue with step 3 of this procedure 1 Install the probe on the input channel 2 Power on the digitizing oscilloscope and allow a 20 minute warm up before doing this procedure TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 83 Probe Cal 3 84 Press SHIFT UTILITY System main gt Cal pop up Look at the status label under Signal Path in the main menu If the status does not read Pass perform a signal path compensation Signal Path Compensation page 3 115 and then continue with this procedure Press the front panel button corresponding to the input channel on which you installed the probe Press VERTICAL MENU gt Cal Probe main STOP Your oscilloscope will detect the type of probe you have installed and display screen messages and menu choices for compensation of probe gain offset or both see Figure 3 44 The following steps will have you run probe gain offset or both depending on the probe the oscilloscope detects 10 11 12 If the message on screen is Probe Offset Compensation rather than Probe Gain Compensation skip to step 15 Connect the probe tip to PROBE COMPENSATION SIGNAL connect the probe ground lead to PROBE COMPENSATION GND Press OK Compensate Gain side Wait for gain compensation to complete one to three minutes When gain comp
171. ogic Word Trigger Optical Opto Electric Converters Accessory Software Warranty Information Service Assurance Tektronix Model Description AM 503S AC DC Uses DC to 50 MHz A6302 Current Probe AM 503S Opt 03 AC DC Uses DC to 15 MHz A6303 Current Probe AM 503S Opt 05 AC DC Uses DC to 100 MHz A6312 Current Probe TCP 202 AC DC DC to 50 MHz TekProbe powered P6021 AC 120 Hz to 60 MHz P6022 AC 935 kHz to 120 MHz CT 1 CT 2 Designed for permanent or semi permanent in circuit installation CT 1 25 kHz to 1 GHz 50 Q input CT 2 1 2 kHz to 200 MHz 50 Q input CT 4 Current Transformer for use with AM 503S and P6021 Peak pulse 1 kA 0 5 Hz to 20 MHz with AM 503S P6408 16 channel one qualifier channel TTL compatible 5 V power Supply required P6701A 500 to 950 nm DC to 850 MHz 1 V mW P6703A 1100 to 1700 nm DC to 1 GHz 1 V mW P6711 500 to 950 nm DC to 250 MHz 5 V mW P6713 1100 to 1700 nm DC to 300 MHz 5 V mW Table A 5 lists optional accessories that are Tektronix software products recommended for use with your digitizing oscilloscope Table A 5 Accessory Software Software Part Number Wavewriter AWG and waveform creation S3FT400 LabWindows forDOS LWDOS for CVI LWCVI WaveS tar WSTR31 The warranty statement for this product is after the title page of this manual Tektronix offers the following services that you can purchase any time during the warranty period of this product m REP Repair Service Assuranc
172. oint between the peaks of the trigger signal Set Level to 50 has no effect when the trigger type is video Note that the MAIN LEVEL knob and menu items apply only to the main trigger level To modify the delayed trigger level use the Level item in the Delayed Trigger menu To Force a Trigger To force the oscilloscope to immediately start acquiring a waveform record even without a trigger event press the FORCE TRIG front panel button TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 25 Edge Triggering A TRIGGER m MAIN LEVEL DELAYED TRIG TRIGGER MENU C SET LEVEL TRIG D O 50 O G E C READY gt Trigger Status Lights SINGLETRIG ARM FORCE TRIG Co Figure 3 14 TRIGGER Controls and Status Lights To Single Trigger To trigger on the next valid trigger event and then stop press SHIFT FORCE TRIG Now press the RUN STOP button each time you want to initiate a single sequence of acquisitions 3 26 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual a 7 2 Fast Fourier Transforms Optional Description Advanced DSP Math provides the Fast Fourier Transform FFT For more information see Waveform Differentiation on page 3 131 Waveform Integra tion on page 3 135 and Waveform Math on page 3 139 The FFT allows you to transform a waveform from a display of its amplitude against time to one that plots the amplitudes of the various discrete frequencies the waveform contains You can
173. olid line indicates the adjustable cursor and a dashed line indicates the fixed cursor Press SELECT to toggle between cursors To adjust both cursors in tracking mode use the general purpose knob To adjust the distance between cursors in tracking mode press SELECT to temporarily suspend cursor tracking Then use the general purpose knob to adjust the distance of the solid cursor relative to the dashed cursor Press SELECT again to resume tracking Select Horizontal Units You can choose to display vertical bar cursor results in the base horizontal units of the waveform or in 1 base horizontal units of the waveform For internally clocked waveforms the units are time or frequency for externally clocked waveforms TDS 400A only the units are clocks or 1 clocks If you have Option 05 Video you can also display the results in terms of video line number see Figure 3 66 To choose vertical bar cursor units do the following step NOTE If Custom video mode is selected you also need to set the Scan Period in the Custom Video menu On a TDS 400A press CURSOR gt Horiz Units main gt Base or 1 Base or with Option 5 video line number side On a TDS 510A press CURSOR gt Time Units main gt seconds or1 seconds or with Option 5 video line number side 3 120 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Taking Cursor Measurements Tek Run S00KS 5 Sample amp Video Line and IRE
174. ons selected for the logic inputs are true then the oscilloscope triggers I gt OR ct Clocked OR If any of the preconditions selected for the logic inputs are true then the oscilloscope triggers a gt NOR 3 gt Clocked NOR If none of the preconditions selected for the logic inputs are true then the oscilloscope triggers 1 Note that for State class triggers the definition must be met at the time the clock input changes state See the descriptions for Pattern and State in this section 2 The definitions given here are correct for the Goes True setting in the Trigger When menu If that menu is set to Goes False swap the definition for AND with that for NAND and for OR with NOR for both pattern and state classes 3 The logic inputs are channels 1 2 3 and 4 when using Pattern Logic Triggers For State Logic Triggers channel 4 becomes the clock input TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Logic Triggering When triggering on a pattern the oscilloscope samples the inputs from all the channels The oscilloscope then triggers if the conditions defined in Table 3 4 and the Trigger When menu are met The other settings in that menu are described in Define a Time Qualified Pattern Trigger on page 3 71 When triggering on a state the oscilloscope waits until the edge of channel 4 transitions in the specified direction At that point the oscillosc
175. ope samples the inputs from the other channels and triggers if the conditions defined in Table 3 4 and the Trigger When menu are met Operations Common to Pattern and State To select when to trigger true or false set the thresholds for each channel select the mode auto or normal and adjust the holdoff Press TRIGGER MENU gt Type main gt Logic pop up gt Class main gt Pattern or State pop up Trigger When To trigger when the logic condition is met Goes TRUE or when the logic condition is not met Goes FALSE Press TRIGGER MENU gt Type main gt Logic pop up gt Class main gt Pattern or State pop up gt Trigger When main gt Goes TRUE or Goes FALSE side Set Thresholds To set the logic threshold for each channel 1 Press TRIGGER MENU gt Type main gt Logic pop up gt Class main gt Pattern or State pop up gt Set Thresholds main gt Chl Ch2 Ch3 or Ch4 side 2 Use the MAIN TRIGGER LEVEL knob the general purpose knob or the keypad to set each threshold TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 69 Logic Triggering Mode amp Holdoff Pattern Operations 3 70 Define Inputs Run 100k5 5S Sample Chi L X 4 Logic Pattern Inputs Edge o E oi M 500ps Pattern HXXX T Pulse l DIC OI O O video m aan ir rage peasy _ Type Class eae Logic when hint amp
176. or the TDS 420A TDS 430A TDS 460A and TDS 510A Digitizing Oscilloscopes The following options are available See Option XL This option standard on the TDS 400A provides a video trigger It lets you trigger on positive or negative sync pulses It allows you to investigate a range of NTSC PAL SECAM and high definition TV signals TDS 510A only With this option Tektronix ships the oscilloscope equipped with an RS 232 and a Centronics interface that can be used to obtain hardcopies of the oscilloscope screen TDS 400A only See Option XL With this option Tektronix ships a K420 instrument cart Tektronix ships the digitizing oscilloscope when ordered with Option 1R configured for installation in a 19 inch wide instrument rack Customers with instruments not configured for rackmounting can order a rackmount kit 016 1166 00 for field conversions TDS 510A only With this option the oscilloscope can compute and display three advanced math waveforms integral of a waveform differential of a waveform and an FFT Fast Fourier Transform of a waveform TDS 400A only See Option XL See Option XL TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual A 1 Appendix A Options and Accessories Option 95 Test Data Report Options A1 A5 International Power Cords Option L1 French User Manual Option L3 German User Manual Option L5 Japanese User Manual Option R2 Service Assurance Repair Option
177. orizontally using Zoom so you can see the clipped portion Also the automated measurement Pk Pk will display a clipping error message if turned on see Automated Measurements of a Derivative Waveform on page 3 132 If your derivative waveform is clipped try either of the following methods to eliminate clipping Reduce the size of the source waveform on screen m Expand the waveform horizontally on screen For instance if you display the source waveform illustrated in Figure 3 73 on page 3 132 so its rising and falling edges are displayed over more horizontal divisions the amplitude of the corresponding derivative pulse will decrease Whichever method you use be sure Zoom is off and the zoom factors are reset see Zoom below Once you have your waveform optimally displayed you can also magnify or contract it vertically and horizontally to inspect any feature Just be sure the differentiated waveform is the selected waveform If you wish to see the zoom factor 2X 5X etc you need to turn zoom on see Zoom on page 3 143 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual I Waveform Integration Optional Waveform integration that allows you to display a math waveform that is an integrated version of the acquired waveform Such waveforms find use in the following applications m Measuring power and energy such as in switching power supplies m Characterizing mechanical transducers as when integrating the o
178. orm The Acquisition menu lets you determine the acquisition mode whether or not to permit equivalent time sampling and how to start and stop acquisitions The digitizing oscilloscope supports five acquisition modes m Sample m Peak Detect m Hi Res m Envelope m Average The Sample Peak Detect and Hi Res modes operate in real time on a single trigger event provided the digitizing oscilloscope can acquire enough samples for each trigger event Envelope and Average modes operate on multiple acquisitions The digitizing oscilloscope averages or envelopes several wave forms on a point by point basis In Sample mode the oscilloscope creates a record point by saving the first sample of perhaps many during each acquisition interval An acquisition interval is the time covered by the waveform record divided by the record length This is the default mode Peak Detect mode alternates between saving the highest sample in one acquisi tion interval and lowest sample in the next acquisition interval This mode only works with real time non interpolated sampling If you set the time base so fast that it requires real time interpolation or equivalent time sampling the mode automatically changes from Peak Detect to Sample although the menu selection does not change In Hi Res mode the digitizing oscilloscope averages all samples taken during an acquisition interval to create a record point That average results in a higher reso lution l
179. oscilloscope applies all waveform specific activities such as measurements or vertical scale and position to the selected channel You can select a channel waveform a math waveform or a reference waveform This section describes how to select a waveform and how you can turn the display of a waveform off To Identify the Selected Channel To determine which channel is currently selected check the channel readout It shows the selected channel in inverse video in the lower left corner of the display The channel reference indicator for the selected channel also appears in reverse video along the left side of the display See Figure 3 59 a N Tek Run 100kKS 5 Sample Save Current Setup To File To Setup1 user To Setup 2 factory To Setup3 factory ail 00mv q M 500s Chis 300mv more Channel Readout lof 3 Save F File Current Ale Setu Setup Utilities Figure 3 59 The Channel Readout To Select and Remove Waveforms To select a channel use the channel selection buttons on the right of the display TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 111 Selecting Channels These buttons are labeled CH 1 CH 2 CH 3 CH 4 and MORE The MORE button allows you to select internally stored Math and Ref waveforms The selected channel is indicated by the lighted LED by each button NOTE
180. ose knob It is represented in the display by a solid line The readout on the display shows the absolute value of the active cursor Attenuation The degree the amplitude of a signal is reduced when it passes through an attenuating device such as a probe or attenuator That is the ratio of the input measure to the output measure For example a 10X probe will attenuate or reduce the input voltage of a signal by a factor of 10 Automatic trigger mode A trigger mode that causes the oscilloscope to automatically acquire if triggerable events are not detected within a specified time period Average acquisition mode In this mode the oscilloscope acquires and displays a waveform that is the averaged result of several acquisitions That reduces the apparent noise The oscilloscope acquires data as in sample mode and then averages it according to a specified number of averages Bandwidth The highest frequency signal the oscilloscope can acquire with no more than 3 dB x 0 707 attenuation of the original reference signal Delay time The time between the trigger event and the acquisition of data Digitizing The process of converting a continuous analog signal such as a waveform to a set of discrete numbers representing the amplitude of the signal at specific points in time Digitizing is composed of two steps sampling and quantizing TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Glossary 1 Glossary
181. overed in that chapter The Appendices provide an option and accessories listing and other useful information The following documents are related to the use or service of the digitizing oscilloscope m The TDS Family Programmer Manual describes using a computer to control the digitizing oscilloscope through the GPIB interface m The TDS 420A TDS 430A TDS 460A amp TDS 510A Reference gives you a quick overview of how to operate your digitizing oscilloscope m The TDS 420A TDS 430A amp TDS 460A Performance Verification and TDS 510A Performance Verification manuals tell how to verify the performance of the digitizing oscilloscope m The TDS Family Option 13 Instruction Manual describes using the optional Centronics and RS 232 interfaces for obtaining hardcopy only for TDS oscilloscopes equipped with that option m The TDS 420A TDS 430A amp TDS 460A Service Manual and the TDS 510A Service Manual provide information for maintaining and servicing your digitizing oscilloscope to the module level TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual ix Preface Conventions In the Getting Started and Reference chapters you will find various procedures which contain steps of instructions for you to perform To keep those instructions clear and consistent this manual uses the following conventions Names of front panel controls and menu labels appear in boldface print m Names also appear in the same case initial
182. ower bandwidth waveform TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 5 Acquisition Modes 3 6 NOTE In Hi Res mode the frequency of the external clock signal TDS 460A TDS 430A and TDS 420A only must be less than or equal to the frequency set in the external clock menu If the frequency of the external clock signal is greater than the frequency in the menu the displayed waveform will have the wrong amplitude This mode only works with real time non interpolated sampling If you set the time base so fast that it requires real time interpolation or equivalent time sampling the mode automatically becomes Sample although the menu selection does not change A key advantage of Hi Res is its potential for increasing resolution regardless of the input signal Tables 3 1 and 3 2 illustrate how you can obtain up to 15 significant bits with Hi Res mode Note that resolutions above 15 bits are not allowed The bits of resolution shown in the tables are theoretically achievable Actual resolution may vary as a function of the correlated noise sources in the test environment Table 3 1 TDS 460A TDS 430A and TDS 420A Resolution Bits Time Base Speed Bits of Resolution 1 us and faster 8 bits 2 us to 5 us 9 bits 10 us to 20 us 10 bits 50 us to 100 us 11 bits 200 us to 500 us 12 bits Table 3 2 TDS 510A Resolution Bits Time Base Speed Bits of Resolution 400 ns and faster 8 bits 1 us to 2 us 9 bits 5 us
183. p the File Utilities side menu See Figure 3 24 Tek Run 50 0GS s ET Sample Use to choose J E0 E Press SELECT to change G F i Directory fdo Free 648KB wits Free disk space Delete TEKOOO01 IMG i 38422 36 11 22 09 41 06 TEK00000 CSVY E 8957 99 10 09 03 29 12 TEKO0001 DAT 3512 99 10 09 03 30 00 Rename DICIO O O eca ave eta saved Current Factory Setup Setup Setup Ololololololoj Figure 3 24 File Utilities TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 43 File System To Delete a File or Directory To delete a file or directory turn the general purpose knob until it scrolls the cursor over the name of the file or directory to delete Then press the side menu Delete button To delete all files in the file list set the cursor to the selection The digitizing oscilloscope deletes a directory and all its contents To Rename a File or Directory 3 44 To rename a file or directory turn the general purpose knob until it scrolls the cursor over the name of the file or directory to delete For example to rename Then press the side menu Rename button The labelling menu should appear Turn the general purpose knob or use the main menu arrow keys to select each letter Press Enter Char from the main menu to enter each letter When you have entered the name
184. pa Sample TDS 4608 Horiz voye Main 38 us Main 50 Dlyd 50KS Runs After tans zoom Status Vert Horiz Lock OFF 2 0 2 0 All OFF Mode Stop Sample ON R S button Saat DZ Offset 5 dams Status Snapshot System Rec length Pos 50 0 500 10 divs Display State Hardcopy OFF OFF Hi low Histogram Bell Chi ch2 Ch3 ch4 OFF Refi Mone None Mone Trigger Waveforms Yo Status Banner DIC OC O O CO CO CO CO CO D Figure 3 7 Status Menu System TDS 400A shown TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 15 Determining Status To Display the Banner To display the banner firmware version options and copyright Press SHIFT STATUS gt Banner main See Figure 3 8 Tek Run bali Sample Tektronix 4 TDS 420A Digitizing Oscilloscope Version FV MFG0 6 Ae Options 05 13 1F 2F c Copyright Tektronix Inc 1991 1995 All rights reserved Oloo elejlelelelea Figure 3 8 Banner Display 3 16 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual O eee Display Modes This section describes how to adjust the oscilloscope display style intensity level graticule and format Change Display Settings To bring up the Display menu press DISPLAY Select the Display St
185. pensation Display 13 14 15 16 18 19 Press SHIFT UTILITY System main gt Diag Err pop up gt Error Log main If there are too many error messages to be seen on screen rotate the general purpose knob clockwise to scroll to the last message Note the compensation error amount Skip to step 19 Disconnect the probe from any signal you may have connected it to Leave the probe installed on its channel Press OK Compensate Offset side Wait for offset compensation to complete one to three minutes If offset compensation does not complete successfully you may get the message Compensation Error This error implies that the probe offset scale 10 error and or offset 50 mV is too great to be compensated You can substitute another probe and continue Have your probe checked by service personnel You can also check the error log by doing steps 13 through 14 After the clock icon is removed verify the word Initialized changed to Pass under Cal Probe in the main menu See Figure 3 44 If desired repeat this procedure beginning at step 1 to compensate for other probe channel combinations TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 85 Probe Cal Changing Probes After a Probe Cal Table 3 6 shows the action the oscilloscope takes based on the probe connected and user operation performed Table 3 6 Probe Cal Status Probe Type of Probe Connected Cal d Simple I
186. play E VERTICAL A HORIZONTAL A POSITION lt POSITION gt 7V O ZOOM VERTICAL HORIZONTAL MENU MENU lt SCALE gt Figure 2 6 The VERTICAL and HORIZONTAL Controls 2 Turn the vertical POSITION knob first one direction then the other Observe the change in the displayed waveform Then return the waveform to the center of the graticule TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 2 15 Tutorial 3 Turn the horizontal SCALE knob one click clockwise Observe the time base readout at the bottom of the display The time base should be set to 200 us div now and you should see two complete waveform cycles on the display Autoset the Oscilloscope When you first connect a signal to a channel and display it the signal displayed may not be scaled and triggered correctly Use the autoset function and you should quickly get a meaningful display You should have a stable display of the probe compensation waveform from the last step Do the following steps to first create an unstable display and then to automatically obtain a stable display 1 To create an unstable display slowly turn the trigger MAIN LEVEL knob see Figure 2 7 first one direction then the other Observe what happens when you move the trigger level above the highest part of the displayed waveform Leave the trigger level in that untriggered state 2 Press AUTOSET see Figure 2 8 and observe the stable waveform display A TRIGGER m MAIN L
187. press OK Use Existing Data side m To erase the Probe Cal data last stored and use the probe uncompensated press OK Erase Probe Cal Data side m To retain the Probe Cal data last stored and use the probe uncompensated press CLEAR MENU NOTE If the Re use Probe Calibration data menu is displayed do not select OK Use Existing Data unless the calibration data was created using the currently installed probe kunning luuKass sample Re use Probe Cal OK Use Existing Cal Data Probe cal data exists for MA but it may not be for the attached probe To use the existing probe cal data for this probe press Use Existing Cal Data To use the probe uncalibrated and erase the existing cal data press Erase Probe Cal Data To use the probe uncalibrated while retaining OK the existing cal data for later use press Erase Probe Clear Menu ne Cal Data T 00 V T 00V M 500ps ChI F DID D ICG CO Figure 3 45 Re use Probe Calibration Data Menu TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 87 Probe Cal 3 88 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual i 4 Probe Compensation Passive probes require compensation to ensure maximum distortion free input to the digitizing oscilloscope and to avoid high frequency amplitude errors see Figure 3 46 If your using a TDS 510A see Probe Cal on pag
188. rner in the display indicates Stopped and shows the number of acquisitions If you press the button again the digitizing oscilloscope resumes taking acquisitions TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 9 Acquisition Modes 3 10 Single Acquisition Sequence side lets you run a single sequence of acquisitions by pressing the RUN STOP button In Envelope or Average mode the digitizing oscilloscope makes the specified number of acquisitions to complete the averaging or enveloping task If the oscilloscope is in equivalent time mode and you press Single Acquisition Sequence side it continues to recognize trigger events and acquire samples until the waveform record is filled NOTE To quickly select Single Acquisition Sequence without displaying the Acquire and Stop After menus press SHIFT FORCE TRIG You still must display the Acquire menu and then the Stop After menu to leave Single Acquisi tion Sequence operation Limit Test Condition Met side lets you acquire waveforms until waveform data exceeds the limits specified in the limit test Then acquisition stops At that point you can also specify other actions for the oscilloscope to take using the selections available in the Limit Test Setup main menu NOTE In order for the digitizing oscilloscope to stop acquisition when limit test conditions are met limit testing must be turned ON using the Limit Test Setup main menu Setting up limit t
189. rtical cursors to a point of interest along the horizon tal axis of the waveform 8 Press SELECT to select the alternate cursor 9 Align the alternate cursor to another point of interest on the math waveform 10 Read the time difference between the cursors from the A readout Read the time difference between the selected cursor and the trigger point for the source waveform from the readout 11 Press Function main gt Paired side 12 Use the technique just outlined to place the long vertical bar of each paired cursor to the points along the horizontal axis you are interested in 13 Read the following values from the cursor readouts m Read the integrated voltage vertical units over time between the Xs of both paired cursors in volt seconds from the A readout m Read the integrated voltage over time between the X of the selected cursor and the reference indicator of the math waveform from the readout TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 137 Waveform Integration m Read the time difference between the long vertical bars of the paired cursors from the A readout Automated Measurements You can also use automated measurements to measure integral math waveforms of an Integral Waveform Use the same procedure as is found under Waveform Differentiation on page 3 132 When using that procedure note that your measurements on an integral waveform will be in volt seconds if the vertical units are
190. s increases accuracy because they reduce leakage When using bell shaped widows be sure that the most interesting parts of the signal in the time domain record are positioned in the center region of the window so that the tapering does not cause severe errors 3 40 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Fast Fourier Transforms 3 dB Highest FFT Window Type Bandpass Filter Bandwidth Side Lobe a at hy j r l i 40 Rectangular Window Soo ooo 0 dB 20 1 28 43 dB 40 Hamming Window Se S 0 dB 20 40 1 28 32 dB 60 Hanning Window 80 0 dB 20 40 e 1 28 94 dB Blackman Harris Window pra 101 Figure 3 23 FFT Windows and Bandpass Characteristics TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 41 Fast Fourier Transforms 3 42 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual A File System The file system provides file utilities and a floppy disk drive for saving hardcopies setups and waveforms This section describes how to manage delete rename and so forth these files using the file system To Access the File Utilities To bring up the File Utilities menu 1 Press the SETUP button to bring up the Save Recall Setup menu or press the WAVEFORM button to bring up the Save Recall Waveform menu or press the Shift HARDCOPY button to bring up the Hardcopy menu 2 Press File Utilities in the main menu to bring u
191. s that are outside the range press Out of Limits side 3 To set the range of pulse widths in units of time press Upper Limit side and Lower Limit side Enter the values with the general purpose knob or keypad The Upper Limit is the maximum valid pulse width the trigger source will look for The Lower Limit is the minimum valid pulse width To set the trigger level with the Level main menu Press TRIGGER MENU gt Type main gt Pulse pop up gt Class main gt Width pop up gt Level main gt Level Set to TTL Set to ECL or Set to 50 side TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual OO A OS Remote Communication This section explains how to prepare and setup the oscilloscope for control and operation over the IEEE Std 488 2 1987 GPIB interface For more information see your programmer manual and the TDS Family Option 13 Instruction Manual Option 13 equipped instruments only To Set Up for Remote To set up remote communications be sure your setup meets GPIB protocol and Operation interface requirements Then do the following procedures Connect the Oscilloscope to the GPIB To connect the oscilloscope plug an IEEE Std 488 2 1987 GPIB cable available from Tektronix part number 012 0991 00 into the GPIB connector on the oscilloscope rear panel and into the GPIB port on your controller or hardcopy device see Figure 3 51 Controller Digitizing Oscilloscope R earP anel
192. s the channel selection buttons On the TDS 420A TDS 460A and TDS 510A Digitizing Oscillo scopes they are CH 1 CH 2 CH 3 CH 4 and MORE Figure 2 11 On the TDS 430A they are CH 1 CH 2 and MORE dr oH D Figure 2 11 The Channel Buttons and Lights Each of the channel CH buttons has a light above or beside its label Do the following steps to add a waveform to the display 1 Ifyou are not continuing from the previous example follow the instructions on page 2 11 under the heading Setting Up for the Examples 2 Press SETUP gt Recall Factory Setup main gt OK Confirm Factory Init side 3 Press AUTOSET 4 Press CH2 The display shows a second waveform which represents the signal on channel 2 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Tutorial There are several other things to observe m The channel readout on the display now shows the settings for both Ch1 and Ch2 m There are two channel indicators at the left edge of the graticule Right now they overlap m The light by the CH 2 button is now on and the vertical controls are now set to adjust channel 2 m The trigger source is not changed by adding a channel You can change the trigger source by using the TRIGGER MENU 5 Turn the vertical POSITION knob clockwise to move the channel 2 waveform up on the graticule Notice that the channel reference indicator for channel 2 moves with the waveform 6 Press VERTIC
193. s until you change some control such as scale factor causing the display to be erased Intensity lets you set overall text graticule and waveform intensity brightness levels To set the intensity Press DISPLAY Intensity main gt Overall Text Grat Waveform or Contrast side Enter the intensity percentage values with the general purpose knob or keypad NOTE The Intensified setting for Timebase in the horizontal menu causes a zone on the waveform to be intensified relative to the rest of the waveform If the contrast is set to 100 you can not distinguish the intensified portion from the rest of the waveform because both are the same brightness To control whether the trigger indicator trigger level bar and current date and time appear on the display and what style trigger level bar long or short is displayed 1 Press DISPLAY Readout main 2 To select whether or not to display a T indicating the trigger point Toggle Display T Trigger Point side You can select ON or OFF The trigger point indicates the position of the trigger in the waveform record 3 To select either the short or the long trigger bar or to turn the trigger bar off toggle Trigger Bar Style side See Figure 3 10 Note that both styles are shown for illustrating purposes but you can only display one style at a time The trigger bar is only displayed if the trigger source is an active displayed waveform Also tw
194. selected in the channel selection buttons and that the FFT math waveform is selected in the More main menu 2 Press CURSOR Mode main gt Independent side gt Func tion main gt H Bars side 3 Use the general purpose knob to align the selected cursor solid line to the top or to any amplitude on the waveform you choose 4 Press SELECT to select the other cursor Use the general purpose knob to align the selected cursor to the bottom or to any amplitude on the waveform you choose 5 Read the amplitude between the two cursors from the A readout Read the amplitude of the selected cursor relative to either 1 Vrms 0 dB ground 0 volts or the zero phase level 0 degrees or 0 radians from the readout The waveform reference indicator at the left side of the graticule indicates the level where phase is zero for phase FFTs TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 31 Fast Fourier Transforms Figure 3 18 shows the cursor measurement of a frequency magnitude on an FFT The readout reads 0 dB because it is aligned with the 1 Vgms level The A readout reads 24 4 dB indicating the magnitude of the frequency it is measuring is 24 4 dB relative to 1 Vrms The source waveform is turned off in the display The cursor units will be in dB or volts for FFTs measuring magnitude and in degrees or radians for those FFTs measuring phase The cursor unit depends on the selection made for Set FFT Vert
195. shows each event at the same position on the screen the displayed waveform will not stretch or compress with system speed changes as it would using the internal clock In external clock mode you can still trigger the oscilloscope to cause the acquired waveforms to lock to a certain position of an encoder which is providing the external clock For example some encoders provide a trigger out signal Another example of a signal that you could use as a trigger is the sector 0 signal in a computer hard disk observing the acquired waveform the trigger T shows where in the record the hard disk returns to sector 0 To acquire a waveform using an external clock 1 Press HORIZONTAL MENU gt Clock main gt External side and if in Hi Res mode use the general purpose knob to set the maximum external clock frequency NOTE In Hi Res mode the frequency of the external clock signal must be less than or equal to the frequency set in the external clock side menu If the frequency of the external clock signal is greater than the frequency set in the side menu the displayed waveform will have the wrong amplitude and often the wrong shape Hi Res mode increases resolution and limits bandwidth see Table 3 1 on page 3 6 As the Max Ext Clk rate is reduced resolution increases and bandwidth decreases TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Horizontal Control CAUTION To prevent damage to the external clock and e
196. sitiveDutyCycle Period TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Measuring Waveforms Table 3 5 Measurement Definitions Cont Positive Overshoot f Positive Width Definition Voltage measurement over the entire waveform or gated region Max High Amplitude Timing measurement of the first pulse in the waveform or gated region The distance time between MidR ef default 50 amplitude points of a positive pulse PositiveOvershoot x 100 _F Risetime sur RMS Timing measurement Time taken for the leading edge of the first pulse in the waveform or gated region to rise from a Low Ref value default 10 to a High Ref value default 90 of its final value Voltage measurement The true Root Mean Square voltage over the entire waveform or gated region Measurement Readouts Measurement Readout Area With no menus displayed the measurement readouts appear at the right of the display see Figure 3 38 When menus are displayed the readouts appear in the graticule area You can display and continuously update as many as four measurements at any one time Tek Run 100kKS 5 Sample Y chi Period 1 010ms chi width 500 s chi Duty 50 4 chi Over 3 3 Oloo gi oom a soous Chi A T08 mV he Lmlolo a lolo o Figure 3 38 Measurement Readouts TDS 420A TDS 430A TDS
197. stopped state shows the number of acquisitions acquired since the last stop or major change TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 7 Acquisition Modes Acquisition Readout gt Run 100kS s Sample Acquisition Sample Hi Res on Lal Envelope 180 Toomv TO M 500s Chit 9 mv Olololoo Average 16 Mode epetitive stop After Limit Test Limit Test reate signal R S button Sources Limit Test Template Figure 3 2 Acquisition Menu and Readout Selecting an Acquisition Mode The oscilloscope provides several acquisition modes To bring up the acquisition menu Figure 3 2 and choose how the digitizing oscilloscope creates points in the waveform record Press SHIFT ACQUIRE MENU gt Mode main gt Sample Peak Detect Hi Res Envelope or Average side NOTE With some longer record lengths the digitizing oscilloscope will not allow selecting Hi Res mode or will reduce the record length setting When you select Envelope or Average you can enter the number of waveform records to be enveloped or averaged using the general purpose knob Selecting Repetitive Sampling To limit the digitizing oscilloscope to real time sampling or let it choose between real time or equivalent time sampling Press SHIFT ACQUIRE MENU
198. t positive peak voltage Measured over the entire waveform or gated region Voltage measurement The arithmetic mean over the entire waveform or gated region Voltage measurement The minimum amplitude Typically the most negative peak voltage Measured over the entire waveform or gated region Timing measurement of the first cycle in the waveform or gated region The ratio of the negative pulse width to the signal period expressed as a percentage NegativeWiath Period Voltage measurement Measured over the entire waveform or gated region NegativeDutyCycle x 100 Low Min 3 Amplitude nae Timing measurement of the first pulse in the waveform or gated region The distance time between MidR ef default 50 amplitude points of a negative pulse NegativeOvershoot Voltage measurement The absolute difference between the maximum and minimum amplitude in the entire waveform or gated region Timing measurement Time it takes for the first complete signal cycle to happen in the waveform or gated region The reciprocal of frequency Measured in seconds Geek Phase Timing measurement The amount one waveform leads or lags another in time Expressed in degrees where 360 comprise one waveform cycle tS 3 74 Positive Duty Cycle Timing measurement of the first cycle in the waveform or gated region The ratio of the positive pulse width to the signal period expressed as a percentage PositiveWidth x 100 Po
199. t testing automatically compares each incoming or math TDS 510A only waveform against a template waveform You set an envelope of limits around a waveform and let the digitizing oscilloscope find waveforms that fall outside those limits see Figure 3 33 When it finds such a waveform the digitizing oscilloscope can generate a hardcopy ring a bell stop and wait for your input or any combination of these actions This section describes how to use limit testing Figure 3 33 Comparing a Waveform to a Limit Template To Create a Limit Test Template To use an incoming or stored waveform to create the limit test template first select a source 1 To access limit testing press SHIFT ACQUIRE MENU to bring up the Acquire menu 2 Press Create Limit Test Template main gt Template Source side gt Chl Ch2 Ch3 Ch4 Math1 Math2 Math3 Ref1 Ref2 Ref3 or Ref4 side NOTE The template will be smoother if you acquire the template waveform using Average acquisition mode Once you have selected a source select a destination for the template 3 Press Template Destination side gt Ref1 Ref2 Ref3 or Ref4 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 63 Limit Testing 3 64 Tek Run 100kKS 5 mplate Source Ch1 Limit Test Template Template Source cht Template Destination Refi V Limit 4omdiv 1 rr ties Pa
200. the file TEKO0O0001 FMT the second to TEKO0002 FMT and so on 5 Display what you want on your hardcopy 6 Press HARDCOPY to print your hardcopy to the selected file To make your hardcopies use the procedures that follow Connect to a Hardcopy Device To connect to a controller with two ports between the digitizing oscilloscope and the hardcopy device connect from the digitizing oscilloscope GPIB connector rear panel to the controller GPIB port and from the controller RS 232 or Centronics port to the hardcopy device see Fig ure 3 29 Use the GPIB port to remotely request and receive a hardcopy from the digitizing oscilloscope Use the RS 232 or a Centronics port on the controller to print output TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 51 Hardcopy 3 52 Hardcopy Device Digitizing Oscilloscope PC Compatible Centronics or GPIB Cable RS 232 Cable Figure 3 29 Connecting the Digitizing Oscilloscope and Hardcopy Device Via a PC Print If your controller is PC compatible and it uses the Tektronix GURU or S3FG210 National Instruments GPIB PCII IIA GPIB package do the following steps to print a hardcopy 1 Use the MS DOS cd command to move to the directory that holds the software that came with your GPIB board For example if you installed the software in the GPIB PC directory type cd GPIB PC 2 Run the IBIC program th
201. tion It is useful for general purpose applications TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Measuring Waveforms Units is helpful for setting precise values For example if you are measuring specifications on an RS 232 C circuit set the levels precisely to RS 232 C specification voltage values by defining the high and low references in units 2 Press High Ref Mid Ref Low Ref or Mid2 Ref side High Ref sets the high reference level The default is 90 Mid Ref sets the middle reference level The default is 50 Low Ref sets the low reference level The default is 10 mA Mid2 Ref sets the middle reference level used on the second waveform specified in Delay or Phase Measurements The default is 50 Tek Run 100kKS 5 Sample Set Levels in E units Reference Levels Chi Amp Rae 304 in ga units MICIO O O 2oomv l TO M 500s Chi 108mv Mid2 Ref 50 o iaaa ameri 5 T Remove Gating l Reference Measrmnt Setup Snapshot forch easrmnt OFF Histagram Levels Figure 3 41 Measure Menu Reference Levels Take a Delay The delay measurement lets you measure from an edge on the selected waveform Measurement to an edge on another waveform To make a delay measurement do the following steps 1 Press MEASURE gt Select Measrmnt main gt Delay side gt Delay To main gt Measure De
202. tions the zero phase reference point to the horizontal center of the screen m In the Horizontal menu vary the trigger position to center the positive peak of the source waveform at the horizontal center of screen Alternately you can adjust the trigger level knob to bring the positive peak to center screen if the phase reference waveform has slow enough edges When impulse testing and measuring phase align the impulse input into the system to the zero reference point of the FFT time domain waveform m Set the trigger position to 50 and horizontal position to 50 for all record lengths less than 15 K TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 37 Fast Fourier Transforms 3 38 m For records with a 15 K length set the trigger position to 33 Use the horizontal position knob to move the trigger T on screen to the center horizontal graticule line m For records with 30 K 50 K or 60 K lengths set the trigger position to 16 6 10 or 8 3 respectively Use the horizontal position knob to move the trigger T on screen and to the center horizontal graticule line m Trigger on the input impulse Adjust Phase Suppression Your source waveform record may have a noise component with phase angles that randomly vary from pi to pi This noise could make the phase display unusable In such a case use phase suppression to control the noise You specify the phase suppression level in dB with respect to 1 Vrms If t
203. to 10 us 10 bits 20 us to 50 us 11 bits 50 us to 100 us 11 bits 100 us to 200 us 12 bits 500 us 13 bits 1 ms to 2 ms 14 bits 5 ms and slower 15 bits TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Acquisition Modes Envelope Mode Envelope mode lets you acquire and display a waveform record that shows the extremes in variation over several acquisitions You specify the number of Agia acquisitions over which to accumulate the data The oscilloscope saves the highest and lowest values in two adjacent intervals similar to the Peak Detect mode But Envelope mode unlike Peak Detect gathers peaks over many trigger events The final display shows the most extreme values for all the acquisitions for each point in the waveform record NOTE Envelope and Average acquisition modes disable Roll mode See Roll Mode beginning on page 3 99 Average Mode Average mode lets you acquire and display a waveform record that is the averaged result of several acquisitions This mode reduces random noise The oscilloscope acquires data after each trigger event using Sample mode Checking the Acquisition Readout To determine the acquisition sampling rate the acquisition state running or stopped and the acquisition mode check the acquisition readout at the top of the display see Figure 3 2 The running state shows the sample rate or External Clock when external clock is enabled and acquisition mode The
204. toggle Fit to Screen to ON from the side menu This provides similar functionality to being in zoom mode and changing the time division until the waveform fits the screen To turn off this feature toggle Fit to Screen to OFF NOTE With Option 1M TDS 400A only there are only 120K points available for reference waveforms If you select the 120K record length in the Horizontal menu you can only save one reference waveform Also you can only use display four waveforms Even if you do not display the source waveforms dual waveform math uses three of the four waveforms For example if you display a math waveform that is the sum of CH I and CH 2 even if CH I and CH 2 are not displayed you have used three waveforms Therefore you can only display one additional waveform TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 57 Horizontal Control 3 58 Horizontal Scale Aliasing To change the horizontal scale time per division numerically in the menu instead of using the Horizontal SCALE knob NOTE If external clock TDS 400A only is enabled and zoom is disabled the Horizontal SCALE knob has no effect and both the Horizontal Main Scale and Delayed Scale are the same 50 c If zoom is enabled you can change the displayed scale but the Delayed Scale is locked to the Main Scale Press HORIZONTAL MENU gt Horiz Controls main gt Main Scale or Delayed Scale side and use the general purpose knob to change t
205. u appears Turn the general purpose knob or use the main menu arrow keys to select each letter Press Enter Char from the main menu to enter each letter When you have entered the name press the side menu OK Accept item See Figure 3 25 To turn on or off the confirm delete message toggle the side menu Confirm Delete button When the confirm delete option is OFF the digitizing oscilloscope immediately deletes files or directories When the confirm option is ON the digitizing oscilloscope warns you before it deletes files and gives you a chance to reconsider To turn on or off the file overwrite lock toggle the side menu Overwrite Lock button TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 45 File System When overwrite lock is on the digitizing oscilloscope will not permit you to write over an existing file of the same name An important reason to allow overwriting is to let you write files using a target file name that contains wild card characters This means the digitizing oscilloscope creates sequential files whose names are similar except for the sequential numbers that go in the real name in the place of the question marks To Format a Disk To format a 720 Kbyte or 1 44 Mbyte disk turn the general purpose knob until it scrolls the cursor over the name of the drive to format fd0 Then press the side menu Format button 3 46 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Hardcopy
206. u have aliased frequencies in your FFT select the source channel and adjust the horizontal scale to increase the sample rate Since you increase the Nyquist frequency as you increase the sample rate the alias signals should appear at their proper frequency TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Fast Fourier Transforms Nyquist Frequency Point Frequency Aliased Frequencies Actual Frequencies Figure 3 21 How Aliased Frequencies Appear in an FFT Considerations for Phase When you set up an FFT math waveform to display the phase angle of the Displays frequencies contained in a waveform take into account the reference point the phase is measured against You may also need to use phase suppression to reduce noise in your FFTs Establish a Zero Phase Reference Point The phase of each frequency is measured with respect to the zero phase reference point The zero reference point is the point at the center of the FFT math waveform but corresponds to various points on the source time domain record See Figure 3 19 on page 3 34 To measure the phase relative to most source waveforms you need only to center the positive peak around the zero phase point For instance center the positive half cycle for a sine or square wave around the zero phase point Use the following method m First be sure the FFT math waveform is selected in the More menu then set horizontal position to 50 in the Horizontal menu This posi
207. unused RAM when spooling hardcopies The size of the spool is therefore variable The number of hardcopies that can be spooled depends on three variables m The amount of unused RAM m The hardcopy format chosen m The complexity of the display TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Hardcopy To Save to a Floppy Disk To Print Using a Controller To send hardcopies to a floppy disk see File System on page 3 43 do the following steps 1 Set up the digitizing oscilloscope communication and hardware parameters as outlined in To Set Up for Making Hardcopies on page 3 47 2 Insert a formatted 720 Kbyte or 1 44 Mbyte floppy disk into the disk slot of the digitizing oscilloscope NOTE See page 3 43 for information on formatting disks deleting and renaming files setting overwrite lock and using wild card characters 3 Press SHIFT gt HARDCOPY MENU gt Port main gt File side to specify that any hardcopy will be output to a file on the floppy drive The file list and its scrollbar will appear 4 Turn the general purpose knob to place the scroll bar over the file in which to store the hardcopy NOTE Upon power on the digitizing oscilloscope creates the wild card file hardcopy format you select Selecting this file and pressing Hardcopy stores a hardcopy in a uniquely named sequentially numbered file For instance the digitizing oscilloscope saves the first hardcopy you save to
208. up menu but you cannot turn it off In order to turn it off press Stop After and specify one of the other choices in the Stop After side menu To turn limit testing on 3 Press Limit Test side to toggle it to ON Single Waveform When making a single waveform versus a single template comparison consider Comparisons the following operating characteristics m The waveform is repositioned horizontally to move the first sample in the waveform record that is outside of template limits to center screen TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 65 Limit Testing m The position of the waveform template tracks that of the waveform Multiple Waveform When comparing multiple waveforms consider the following Comparisons operating characteristics m Set Horizontal Lock to None in the Zoom side menu push ZOOM and toggle Horizontal Lock to None m With horizontal lock set as just described the oscilloscope repositions each waveform horizontally to move the first sample in the waveform record that is outside of template limits to center screen m If you are comparing each waveform to its own template the position of each waveform template tracks that of its waveform m If you are comparing two or more waveforms to a common template the template tracks the position of the failed waveform If more than one waveform fails during the same acquisition the template tracks the position of the waveform in the highest
209. ur relative to the main trigger You also can select Delayed Runs After Main or Delayed Triggerable For more information on the delayed trigger see Delayed Triggering on page 3 11 Horizontal Clock To change the horizontal clock TDS 400A only Press HORIZONTAL MENU gt Clock main gt Internal or External side and use the general purpose knob to change the scale values TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 59 Horizontal Control NOTE When you select External clock TDS 400A only the unzoomed horizontal scale changes to 50 c indicating 50 clocks per division When using Option 2F external clock and cursors to measure frequency the displayed frequency is normalized to the external Clock frequency To calculate the actual frequency multiply the displayed frequency by the external clock frequency divided by Hertz For example if the displayed cursor frequency is 500 Hz and the external clock frequency is 2 kHz 500 Hz x E 1 9 MHz Hz To Acquire a waveform Using an External Clock TDS 400A Only 3 60 A disk drive turbine and a punch press all have parts that move or turn Their behavior is often best observed using an external Clock By using a Tachometer or a Optical Encoder you can precisely convert the revolution or travel of the systems into electric pulses By using an external clock you can see the angle or position at which events occur As the system speed changes the display
210. urs when the oscilloscope is limited to real time sampling and the time base is set to a value that exceeds the effective sample rate of the oscilloscope The digitizing oscilloscope has two interpolation options linear or sin x x interpolation Linear interpolation calculates record points in a straight line fit between the actual values acquired Sin x x computes record points in a curve fit between the actual values acquired It assumes all the interpolated points fall in their appropriate point in time on that curve Main menu buttons Bezel buttons under the main menu display They allow you to select items in the main menu Pixel A visible point on the display The oscilloscope display is 640 pixels wide by 480 pixels high Pop up menu A sub menu of a main menu Pop up menus temporarily occupy part of the waveform display area and are used to present additional choices associated Glossary 2 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Glossary with the main menu selection You can cycle through the options in a pop up menu by repeatedly pressing the main menu button underneath the pop up Posttrigger The specified portion of the waveform record that contains data acquired after the trigger event Pretrigger The specified portion of the waveform record that contains data acquired before the trigger event Quantizing The process of converting an analog input that was sampled such as a voltage to a digita
211. utput of an accelerometer to obtain velocity The waveform vertical scale is in volt seconds its horizontal scale is in seconds If you are not using a voltage probe some digitizing oscilloscopes can display other vertical units Operation To obtain an integral math waveform 1 2 Connect the waveform to the desired channel input and select that channel Adjust the vertical and horizontal scales and trigger the display or press AUTOSET Press MORE gt Math1 Math2 or Math3 main gt Change Math waveform definition side gt Single Wfm Math main Press Set Single Source to side Repeatedly press the same button until the channel source selected in step 1 appears in the menu label Press Set Function to side Repeatedly press the same button until intg appears in the menu label Press OK Create Math Waveform side to turn on the integral math waveform see Figure 3 75 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 135 Waveform Integration Integral Math Waveform Source Waveform gt _ Cursor Measurements of an Integral Waveform 3 136 Running 50 0MS s Sample Math Change Math waveform definition DI CI O O O chi iovo lt M1 00Ms Chi 640mV TEHE 1 00uvs 1 00s Matha Ololololololoj Figure 3 75 Integral Math Waveform Onc
212. ve Main Trigger menu 3 93 3 94 Noise reducing in FFTs 3 35 reducing in phase FFTs 3 30 3 38 Index 8 Noise Rej Main Trigger menu 3 23 NonInterlaced Both Fields Video Trigger menu 3 129 NOR Main Trigger menu 3 68 NOR Main Trigger menu 3 71 3 72 Normal trigger mode 3 24 Normal Main Trigger menu 3 24 3 70 3 93 NTSC Video Standard 3 128 NTSC Display menu 3 19 NTSC Video Trigger menu 3 128 Nyquist frequency 3 36 O OFF Real Time Only Acquire menu 3 8 Off Bus Utility menu 3 98 Offset DC See DC Offset Vertical 3 125 vertical 3 34 3 133 3 138 Offset Vertical menu 3 125 OK Confirm Clear Spool Hardcopy menu 3 50 OK Create Math Wfm More menu 3 140 OK Create Measurement Measure Delay menu 3 80 OK Erase Ref amp Panel Memory Utility menu 3 104 OK Store Template Acquire menu 3 64 ON Enable ET Acquire menu 3 8 ON STBY button 1 5 2 3 Options A 1 OR Main Trigger menu 3 68 OR Main Trigger menu 3 71 3 72 Overall Display menu 3 18 Overwrite Lock File Utilities menu 3 45 P Packaging B 1 Paired cursor 3 117 PAL Video Standard 3 128 PAL Display menu 3 19 PAL Video Trigger menu 3 128 Pattern trigger 3 67 3 70 Pattern Main Trigger menu 3 69 PCX 3 47 PCX Color Hardcopy menu 3 48 PCX Hardcopy menu 3 48 Peak detect acquisition mode 3 5 Peak Detect Acquire menu 3 8 Peak to peak 3 74 Period 3
213. veform Record vs FFT Time Domain Record 3 34 Figure 3 20 FFT Time Domain Record vs FFT Frequency Domain Record i sc icc iee keto dee voce wee cece se edes 3 34 Figure 3 21 How Aliased Frequencies Appear in an FFT 3 37 Figure 3 22 Windowing the FFT Time Domain Record 3 40 Figure 3 23 FFT Windows and Bandpass Characteristics 3 41 Figure 3 24 File Utilities 20 0 cece cc ccc cece ee ee ee eens 3 43 Figure 3 25 File System Labelling Menu 4 3 44 Figure 3 26 Utility Menu System I O 0 ee ee eee 3 48 Figure 3 27 Date and Time Display e eee eeeee 3 49 Figure 3 28 Connecting the Digitizing Oscilloscope Directly to the Hardcopy Device cece ccc cece ee ee eee eee 3 50 Figure 3 29 Connecting the Digitizing Oscilloscope and Hardcopy Device Via amp PC sie dvieisiocere 6 09 t30 nie sin ersians a bug eka eia 3 52 Figure 3 30 Record View and Time Base Readouts 3 55 Figure 3 31 Horizontal Controls 0 cece cece eee eeee 3 56 Figure 3 32 Aliasing 0 0 cscs cesses ees stctesseeesnsaee 3 58 Figure 3 33 Comparing a Waveform to a Limit Template 3 63 Figure 3 34 Acquire Menu Create Limit Test Template 3 64 Figure 3 35 Logic Trigger Readouts eee ee eee eens 3 68 Figure 3 36 Logic Trigger Menu ce cee eee cere eee 3 70 Figure 3 37 Logic Trigger Menu Time Qualifi
214. wer Threshold RuntP ulse Crosses FirstT hreshold Only Recrosses First Threshold ER Level and Triggers Acquisition Upper Threshold E Unselected Trigger Bar gt M 20 0us Runt Ch1 Tht 40mvV 7 5a8ml re ee Source Polarity 3 Mode Type Class Fae hres holds amp lt Pulse gt lt Runt gt chi Positive Thresholds Holdoff CI O O O Lalo CO CO 2 Figure 3 50 Main Trigger Menu Runt Class Thresholds To set the two threshold levels used in detecting a runt pulse 1 Press TRIGGER MENU gt Type main gt Pulse pop up gt Class main gt Runt pop up gt Thresholds main 2 Use the general purpose knob or keypad to set the values for the high and low thresholds Hint To use the Trigger Bar feature to set the threshold levels on the pulse train press DISPLAY Readout Options main gt Trigger Bar Style side until Long appears in that menu item Note the position of the trigger indicator in Figure 3 50 Triggering occurs at the point the pulse returns over the first lower threshold going negative without crossing the second threshold level upper Be aware of the following consider ations when using Runt triggering When Positive is set in the Polarity side menu the lower threshold must be first crossed going positive then recrossed going negative without crossing the upper thres
215. wo or more waveforms If you want the POSITION knob to move faster press the SHIFT button When the light next to the SHIFT button is on and the display says Coarse Knobs in the upper right corner the POSITION knob speeds up significantly To Check the Vertical Scale Check the Vertical readout at the bottom left part of the display for the volts di vision setting of each displayed channel the selected channel is in inverse video See Figure 3 67 To Change Vertical Parameters Use the Vertical menu see Figure 3 67 to select the coupling bandwidth and offset for the selected waveform This menu also lets you numerically change the position or scale TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 123 Vertical Control 3 124 Vertical Readout Coupling DC ACO GND Bandwidth Tek Run 1 00MS s Sample Impedance 1M ij Ch Coupling Impedance ICI CI O O 50 0mVa gt lt Ms0 0ps Chir i 5 i k 7M Em candwidth ne Scale position offset Full S0MV 260mdiv au GIGIO EIS Ioa Figure 3 67 Vertical Readouts and Channel Menu To choose the type of coupling for attaching the input signal to the vertical attenuator for the selected channel and to set its input impedance Press VERTICAL MENU gt Coupling main gt DC AC GND or Q side DC coupling shows both the AC and
216. xternal trigger circuitry A N do not exceed the input voltage rating of the EXT CLOCK AUX TRIGGER input see Auxiliary Trigger Input External Clock Input in your Performance Verification manual 2 Connect your TTL like external clock signal to the EXT CLOCK AUX TRIGGER BNC at the rear of the oscilloscope If your EXT CLK source can drive 50Q to TTL levels use a 509 terminator Before connecting your external clock signal make certain the signal has TTL levels and a 30 us or faster falling edge In External Clock mode sampling occurs on the falling edge of the clock 3 Connect the signals you wish to acquire to the input channels NOTE If you set the maximum clock frequency to 1 kHz do not connect an external clock with a frequency greater than I kHz If you do you may need to remove the external clock signal and turn the oscilloscope power off and then on 4 To bring up the Edge Trigger menu and select which source you want for the trigger press TRIGGER MENU gt Type main gt Edge pop up gt Source main gt Ch1 Ch2 Ch3 Ch4 AC Line or Auxiliary side and then press SET LEVEL TO 50 5 Set all other oscilloscope controls the horizontal SCALE has no effect except in ZOOM as you would for an internally clocked acquisition TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 61 Horizontal Control 3 62 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual SSS Le Limit Testing Limi
217. y of traditional horizontal and vertical knobs TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 1 1 Product Description m Four channels and four eight bit digitizers on the TDS 420A TDS 460A and TDS 510A Two channels and two eight bit digitizers on the TDS 430A m On line help at the touch of a button Appendix A lists the options and accessories The product specification is in the performance verification manual that is shipped as a standard accessory with the digitizing oscilloscope 1 2 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual C Ae Start Up Before you use the digitizing oscilloscope ensure that it is properly installed and powered on Operation To properly install and power on the digitizing oscilloscope do the following steps Installation 1 Be sure you have the appropriate operating environment Specifications for temperature relative humidity altitude vibrations and emissions are included in performance verification and specification manuals Tektronix part numbers 070 9705 xx and 070 9706 xx 2 Leave space for cooling Do this by verifying that the air intake and exhaust holes on the sides of the cabinet where the fan operates are free of any airflow obstructions Leave at least 2 inches 5 1 cm free on each side WARNING To avoid electrical shock be sure that the power cord is disconnected before checking the fuse 3 Check the fuse to be sure it is the proper type
218. yle Press DISPLAY gt Style main gt Vectors Intensified Samples Dots Infinite Persistence or Variable Persistence side Figure 3 9 Tek Run 10 0kS 5 Sample Display Style JPL i Vectors Dots Intensified Samples Infinite Persistence 2oomv l lt M5 00ms Chi f 72mVY peices style Readout Filter Graticule Format EA Options Sin x x Full YT GSS SaSao Figure 3 9 Display Menu Style Vectors style displays draw vectors lines between the record points Dots style displays waveform record points as dots Intensified Samples style also displays waveform record points as dots However the points actually sampled are displayed intensified relative to the interpolated points TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 17 Display Modes 3 18 Adjust Intensity Set Display Readout Options In addition to choosing Intensified Samples in the side menu the oscilloscope must be interpolating equivalent time must be off or Zoom must be on with its horizontal expansion greater that 1X See Zoom beginning on page 3 143 Variable Persistence accumulates the record points on screen over many acquisi tions and displays them only for a specific time interval In that mode the display behaves like that of an analog oscilloscope Infinite Persistence accumulates the record point
219. ype main gt Pulse pop up gt Level main gt Level Set to TTL Set to ECL or Set to 50 side See To Set Level on page 3 93 for more information TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual 3 93 Pulse Triggering Runt Operation When you select the pulse class Runt the oscilloscope will trigger on a short pulse that crosses one threshold but fails to cross a second threshold before recrossing the first To set up runt triggering 1 Press TRIGGER MENU gt Type main gt Pulse pop up gt Class main gt Runt pop up gt Source main gt Ch1 Ch2 Ch3 or Ch4 side See Figure 3 50 2 Press Polarity main gt Positive Negative or Either side 3 Press Thresholds main and set the upper and lower thresholds for runt detection with the side menu selections and the keypad or the general purpose knob Polarity To specify the direction of the runt pulse Press TRIGGER MENU gt Type main gt Pulse pop up gt Class main gt Runt pop up gt Polarity main gt Positive Negative or Either side m Positive looks for positive going runt pulses m Negative looks for negative going runt pulses m Either looks for both positive and negative runt pulses 3 94 TDS 420A TDS 430A TDS 460A amp TDS 510A User Manual Pulse Triggering Stopped 20136 Acquisitions Runt Low Threshold 130mvV Pulse Runt Thresholds SelectedTriggerBarat at Lo

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